MG5aMC_PY8_interface broken

[matthewfeickert]

Solution to issue cannot be found in the documentation.

• I checked the documentation.

Issue

For osx-arm64 builds of mg5amcnlo following PR #6, running something like

# tutorial.mg5
generate p p > t t~

display particles
display multiparticles

add process p p > W+ j, W+ > l+ vl @2

output MY_FIRST_MG5_RUN

launch MY_FIRST_MG5_RUN
  # Use PYTHIA8 for the shower/hadronization
  shower=Pythia8
  # Generate 1000 events
  set nevents 1000
  # Set random seed
  set iseed 0

results in Pythia erroring and aborting at the end.

Full log for pixi run mg5_aMC tutorial.mg5:

************************************************************
*                                                          *
*                     W E L C O M E to                     *
*              M A D G R A P H 5 _ a M C @ N L O           *
*                                                          *
*                                                          *
*                 *                       *                *
*                   *        * *        *                  *
*                     * * * * 5 * * * *                    *
*                   *        * *        *                  *
*                 *                       *                *
*                                                          *
*         VERSION 3.5.7                 2024-11-29         *
*                                                          *
*    The MadGraph5_aMC@NLO Development Team - Find us at   *
*              http://madgraph.phys.ucl.ac.be/             *
*                            and                           *
*            http://amcatnlo.web.cern.ch/amcatnlo/         *
*                                                          *
*               Type 'help' for in-line help.              *
*           Type 'tutorial' to learn how MG5 works         *
*    Type 'tutorial aMCatNLO' to learn how aMC@NLO works   *
*    Type 'tutorial MadLoop' to learn how MadLoop works    *
*                                                          *
************************************************************
load MG5 configuration from .pixi/envs/default/MG5_aMC/input/mg5_configuration.txt 
set fastjet to /private/tmp/example/.pixi/envs/default/bin/fastjet-config
set eMELA to /private/tmp/example/.pixi/envs/default/bin/eMELA-config
set lhapdf to lhapdf-config
set lhapdf to /private/tmp/example/.pixi/envs/default/bin/lhapdf-config
Using default text editor "vi". Set another one in ./input/mg5_configuration.txt
�[1;34mWARNING: launching caffeinate to prevent idle sleep when MG5aMC is running. Run './bin/mg5_aMC -s' to prevent this. �[0m
import /private/tmp/example/tutorial.mg5
The import format was not given, so we guess it as command
generate p p > t t~
No model currently active, so we import the Standard Model
INFO: Restrict model sm with file .pixi/envs/default/MG5_aMC/models/sm/restrict_default.dat . 
INFO: Run "set stdout_level DEBUG" before import for more information. 
INFO: Change particles name to pass to MG5 convention 
Defined multiparticle p = g u c d s u~ c~ d~ s~
Defined multiparticle j = g u c d s u~ c~ d~ s~
Defined multiparticle l+ = e+ mu+
Defined multiparticle l- = e- mu-
Defined multiparticle vl = ve vm vt
Defined multiparticle vl~ = ve~ vm~ vt~
Defined multiparticle all = g u c d s u~ c~ d~ s~ a ve vm vt e- mu- ve~ vm~ vt~ e+ mu+ t b t~ b~ z w+ h w- ta- ta+
INFO: Checking for minimal orders which gives processes. 
INFO: Please specify coupling orders to bypass this step. 
INFO: Trying coupling order WEIGHTED<=2: WEIGTHED IS QCD+2*QED 
INFO: Trying process: g g > t t~ WEIGHTED<=2 @1  
INFO: Process has 3 diagrams 
INFO: Trying process: u u~ > t t~ WEIGHTED<=2 @1  
INFO: Process has 1 diagrams 
INFO: Trying process: u c~ > t t~ WEIGHTED<=2 @1  
INFO: Trying process: c u~ > t t~ WEIGHTED<=2 @1  
INFO: Trying process: c c~ > t t~ WEIGHTED<=2 @1  
INFO: Process has 1 diagrams 
INFO: Trying process: d d~ > t t~ WEIGHTED<=2 @1  
INFO: Process has 1 diagrams 
INFO: Trying process: d s~ > t t~ WEIGHTED<=2 @1  
INFO: Trying process: s d~ > t t~ WEIGHTED<=2 @1  
INFO: Trying process: s s~ > t t~ WEIGHTED<=2 @1  
INFO: Process has 1 diagrams 
INFO: Process u~ u > t t~ added to mirror process u u~ > t t~ 
INFO: Process c~ c > t t~ added to mirror process c c~ > t t~ 
INFO: Process d~ d > t t~ added to mirror process d d~ > t t~ 
INFO: Process s~ s > t t~ added to mirror process s s~ > t t~ 
5 processes with 7 diagrams generated in 0.008 s
Total: 5 processes with 7 diagrams
display particles
Current model contains 17 particles:
w+/w- ve/ve~ vm/vm~ vt/vt~ u/u~ c/c~ t/t~ d/d~ s/s~ b/b~ e-/e+ mu-/mu+ ta-/ta+ 
a z g h 
display multiparticles
Multiparticle labels:
p = g u c d s u~ c~ d~ s~
j = g u c d s u~ c~ d~ s~
l+ = e+ mu+
l- = e- mu-
vl = ve vm vt
vl~ = ve~ vm~ vt~
all = g u c d s u~ c~ d~ s~ a ve vm vt e- mu- ve~ vm~ vt~ e+ mu+ t b t~ b~ z w+ h w- ta- ta+
add process p p > W+ j, W+ > l+ vl @2
p p > W+ j, W+ > l+ vl 
INFO: Checking for minimal orders which gives processes. 
INFO: Please specify coupling orders to bypass this step. 
INFO: Trying coupling order WEIGHTED<=3: WEIGTHED IS QCD+2*QED 
INFO: Trying process: g u > w+ d WEIGHTED<=3 @2  
INFO: Process has 2 diagrams 
INFO: Trying process: g u > w+ s WEIGHTED<=3 @2  
INFO: Trying process: g c > w+ d WEIGHTED<=3 @2  
INFO: Trying process: g c > w+ s WEIGHTED<=3 @2  
INFO: Process has 2 diagrams 
INFO: Crossed process found for g d~ > w+ u~, reuse diagrams. 
INFO: Crossed process found for g s~ > w+ c~, reuse diagrams. 
INFO: Process u g > w+ d added to mirror process g u > w+ d 
INFO: Crossed process found for u d~ > w+ g, reuse diagrams. 
INFO: Process c g > w+ s added to mirror process g c > w+ s 
INFO: Crossed process found for c s~ > w+ g, reuse diagrams. 
INFO: Process d~ g > w+ u~ added to mirror process g d~ > w+ u~ 
INFO: Process d~ u > w+ g added to mirror process u d~ > w+ g 
INFO: Process s~ g > w+ c~ added to mirror process g s~ > w+ c~ 
INFO: Process s~ c > w+ g added to mirror process c s~ > w+ g 
INFO: Checking for minimal orders which gives processes. 
INFO: Please specify coupling orders to bypass this step. 
INFO: Trying process: w+ > e+ ve WEIGHTED<=2  
INFO: Process has 1 diagrams 
INFO: Trying process: w+ > e+ vm WEIGHTED<=2  
INFO: Trying process: w+ > e+ vt WEIGHTED<=2  
INFO: Trying process: w+ > mu+ ve WEIGHTED<=2  
INFO: Trying process: w+ > mu+ vm WEIGHTED<=2  
INFO: Process has 1 diagrams 
INFO: Trying process: w+ > mu+ vt WEIGHTED<=2  
1 processes with 14 diagrams generated in 0.015 s
Total: 6 processes with 21 diagrams
output MY_FIRST_MG5_RUN
INFO: initialize a new directory: MY_FIRST_MG5_RUN 
INFO: remove old information in MY_FIRST_MG5_RUN 
INFO: Organizing processes into subprocess groups 
INFO: Organizing processes into subprocess groups 
INFO: Organizing processes into subprocess groups 
INFO: Generating Helas calls for process: g u > w+ d WEIGHTED<=3 @2 
INFO: Combined process g c > w+ s WEIGHTED<=3 @2 with process g u > w+ d WEIGHTED<=3 @2 
INFO: Generating Helas calls for process: g d~ > w+ u~ WEIGHTED<=3 @2 
INFO: Combined process g s~ > w+ c~ WEIGHTED<=3 @2 with process g d~ > w+ u~ WEIGHTED<=3 @2 
INFO: Generating Helas calls for process: u d~ > w+ g WEIGHTED<=3 @2 
INFO: Combined process c s~ > w+ g WEIGHTED<=3 @2 with process u d~ > w+ g WEIGHTED<=3 @2 
INFO: Generating Helas calls for process: w+ > e+ ve WEIGHTED<=2 
INFO: Generating Helas calls for process: w+ > mu+ vm WEIGHTED<=2 
INFO: Combine g u > w+ d WEIGHTED<=3 @2 with decays w+ > e+ ve WEIGHTED<=2 
INFO: Combine g u > w+ d WEIGHTED<=3 @2 with decays w+ > mu+ vm WEIGHTED<=2 
INFO: Combining process with g u > w+ d WEIGHTED<=3 @2
  Decay: w+ > e+ ve WEIGHTED<=2 
INFO: Combine g d~ > w+ u~ WEIGHTED<=3 @2 with decays w+ > e+ ve WEIGHTED<=2 
INFO: Combine g d~ > w+ u~ WEIGHTED<=3 @2 with decays w+ > mu+ vm WEIGHTED<=2 
INFO: Combining process with g d~ > w+ u~ WEIGHTED<=3 @2
  Decay: w+ > e+ ve WEIGHTED<=2 
INFO: Combine u d~ > w+ g WEIGHTED<=3 @2 with decays w+ > e+ ve WEIGHTED<=2 
INFO: Combine u d~ > w+ g WEIGHTED<=3 @2 with decays w+ > mu+ vm WEIGHTED<=2 
INFO: Combining process with u d~ > w+ g WEIGHTED<=3 @2
  Decay: w+ > e+ ve WEIGHTED<=2 
INFO: Processing color information for process: g u > w+ d @2
  Decay: w+ > e+ ve WEIGHTED<=2 
INFO: Processing color information for process: g d~ > w+ u~ @2
  Decay: w+ > e+ ve WEIGHTED<=2 
INFO: Processing color information for process: u d~ > w+ g @2
  Decay: w+ > e+ ve WEIGHTED<=2 
INFO: Generating Helas calls for process: g g > t t~ WEIGHTED<=2 @1 
INFO: Processing color information for process: g g > t t~ @1 
INFO: Generating Helas calls for process: u u~ > t t~ WEIGHTED<=2 @1 
INFO: Processing color information for process: u u~ > t t~ @1 
INFO: Combined process c c~ > t t~ WEIGHTED<=2 @1 with process u u~ > t t~ WEIGHTED<=2 @1 
INFO: Combined process d d~ > t t~ WEIGHTED<=2 @1 with process u u~ > t t~ WEIGHTED<=2 @1 
INFO: Combined process s s~ > t t~ WEIGHTED<=2 @1 with process u u~ > t t~ WEIGHTED<=2 @1 
INFO: Creating files in directory P1_gg_ttx 
�[1mINFO: Some T-channel width have been set to zero [new since 2.8.0]
 if you want to keep this width please set "zerowidth_tchannel" to False �[0m
INFO: Generating Feynman diagrams for Process: g g > t t~ WEIGHTED<=2 @1 
INFO: Finding symmetric diagrams for subprocess group gg_ttx 
INFO: Creating files in directory P1_qq_ttx 
INFO: Generating Feynman diagrams for Process: u u~ > t t~ WEIGHTED<=2 @1 
INFO: Finding symmetric diagrams for subprocess group qq_ttx 
INFO: Creating files in directory P2_gq_wpq_wp_lvl 
INFO: Generating Feynman diagrams for Process: g u > w+ d WEIGHTED<=3 @2
  Decay: w+ > e+ ve WEIGHTED<=2 
INFO: Generating Feynman diagrams for Process: g d~ > w+ u~ WEIGHTED<=3 @2
  Decay: w+ > e+ ve WEIGHTED<=2 
INFO: Finding symmetric diagrams for subprocess group gq_wpq_wp_lvl 
INFO: Creating files in directory P2_qq_wpg_wp_lvl 
INFO: Generating Feynman diagrams for Process: u d~ > w+ g WEIGHTED<=3 @2
  Decay: w+ > e+ ve WEIGHTED<=2 
INFO: Finding symmetric diagrams for subprocess group qq_wpg_wp_lvl 
Generated helas calls for 5 subprocesses (10 diagrams) in 0.015 s
Wrote files for 46 helas calls in 0.085 s
ALOHA: aloha starts to compute helicity amplitudes
ALOHA: aloha creates 3 routines in  0.295 s
save configuration file to /private/tmp/example/MY_FIRST_MG5_RUN/Cards/me5_configuration.txt
INFO: Use Fortran compiler /private/tmp/example/.pixi/envs/default/bin/arm64-apple-darwin20.0.0-gfortran 
INFO: Use c++ compiler /private/tmp/example/.pixi/envs/default/bin/ 
INFO: Generate jpeg diagrams 
INFO: Generate web pages 
Output to directory /private/tmp/example/MY_FIRST_MG5_RUN done.
Type "launch" to generate events from this process, or see
/private/tmp/example/MY_FIRST_MG5_RUN/README
Run "open index.html" to see more information about this process.
launch MY_FIRST_MG5_RUN
************************************************************
*                                                          *
*                      W E L C O M E to                    *
*             M A D G R A P H 5 _ a M C @ N L O            *
*                      M A D E V E N T                     *
*                                                          *
*                 *                       *                *
*                   *        * *        *                  *
*                     * * * * 5 * * * *                    *
*                   *        * *        *                  *
*                 *                       *                *
*                                                          *
*         VERSION 3.5.7                 2024-11-29         *
*                                                          *
*    The MadGraph5_aMC@NLO Development Team - Find us at   *
*    https://server06.fynu.ucl.ac.be/projects/madgraph     *
*                                                          *
*               Type 'help' for in-line help.              *
*                                                          *
************************************************************
INFO: load configuration from /private/tmp/example/MY_FIRST_MG5_RUN/Cards/me5_configuration.txt  
INFO: load configuration from /private/tmp/example/.pixi/envs/default/MG5_aMC/input/mg5_configuration.txt  
INFO: load configuration from /private/tmp/example/MY_FIRST_MG5_RUN/Cards/me5_configuration.txt  
INFO: set f2py compiler to /private/tmp/example/.pixi/envs/default/bin/f2py 
INFO: set f2py compiler to /private/tmp/example/.pixi/envs/default/bin/f2py 
Using default text editor "vi". Set another one in ./input/mg5_configuration.txt
generate_events run_01
The following switches determine which programs are run:
/=================== Description ===================|============= values ==============|======== other options ========\
| 1. Choose the shower/hadronization program        | �[1m       shower�[0m = �[31mOFF�[0m               |     Pythia8                   |
| 2. Choose the detector simulation program         | �[1m     detector�[0m = �[01mNot Avail.�[0m        |     Please install module     |
| 3. Choose an analysis package (plot/convert)      | �[1m     analysis�[0m = �[01mNot Avail.�[0m        |     Please install module     |
| 4. Decay onshell particles                        | �[1m      madspin�[0m = �[31mOFF�[0m               |     ON|onshell|full           |
| 5. Add weights to events for new hypp.            | �[1m     reweight�[0m = �[31mOFF�[0m               |     ON                        |
\=======================================================================================================================/
Either type the switch number (1 to 5) to change its setting,
Set any switch explicitly (e.g. type 'shower=Pythia8' at the prompt)
Type 'help' for the list of all valid option
Type '0', 'auto', 'done' or just press enter when you are done.
set nevents 1000
�[1mINFO: modify parameter nevents of the run_card.dat to 1000 �[0m
set iseed 0
�[1mINFO: modify parameter iseed of the run_card.dat to 0 �[0m
Do you want to edit a card (press enter to bypass editing)?
/------------------------------------------------------------\
|  �[31m1�[0m. param   : �[32mparam_card.dat�[0m                               |
|  �[31m2�[0m. run     : �[32mrun_card.dat�[0m                                 |
|  �[31m3�[0m. pythia8 : �[32mpythia8_card.dat�[0m                             |
\------------------------------------------------------------/
 you can also
   - enter the path to a valid card or banner.
   - use the 'set' command to modify a parameter directly.
     The set option works only for param_card and run_card.
     Type 'help set' for more information on this command.
   - call an external program (ASperGE/MadWidth/...).
     Type 'help' for the list of available command
 [�[4m0�[0m, done, 1, param, 2, run, 3, pythia8, enter path]
�[1mThe answer to the previous question is not set in your input file�[0m
�[1mUse 0 value�[0m
INFO: Update the dependent parameter of the param_card.dat 
�[1;34mWARNING: update the strong coupling value (alpha_s) to the value from the pdf selected: 0.13 �[0m
Generating 1000 events with run name run_01
survey  run_01 
INFO: compile directory 
compile Source Directory
Using random number seed offset = 21
INFO: Running Survey 
Creating Jobs
Working on SubProcesses
INFO: Compiling for process 1/4. 
INFO:     P1_gg_ttx  
INFO: Compiling for process 2/4. 
INFO:     P1_qq_ttx  
INFO: Compiling for process 3/4. 
INFO:     P2_gq_wpq_wp_lvl  
INFO: Compiling for process 4/4. 
INFO:     P2_qq_wpg_wp_lvl  
INFO:     P1_gg_ttx  
INFO:     P1_qq_ttx  
INFO:     P2_gq_wpq_wp_lvl  
INFO:     P2_qq_wpg_wp_lvl  
INFO:  Idle: 1,  Running: 3,  Completed: 0 [ current time: 11h25 ] 
INFO:  Idle: 0,  Running: 3,  Completed: 1 [  0.1s  ] 
INFO:  Idle: 0,  Running: 0,  Completed: 4 [  0.6s  ] 
INFO: End survey 
refine 1000
Creating Jobs
INFO: Refine results to 1000 
INFO: Generating 1000.0 unweighted events. 
sum of cpu time of last step: 2 seconds
INFO: Effective Luminosity 0.23140117848763522 pb^-1 
INFO: need to improve 1 channels 
- Current estimate of cross-section: 5185.798999999999 +- 71.75612130755465
    P1_gg_ttx 
    P1_qq_ttx 
    P2_gq_wpq_wp_lvl 
    P2_qq_wpg_wp_lvl 
INFO:  Idle: 0,  Running: 1,  Completed: 0 [ current time: 11h25 ] 
INFO:  Idle: 0,  Running: 0,  Completed: 1 [  1s  ] 
INFO: Combining runs 
sum of cpu time of last step: 3 seconds
INFO: finish refine 
refine 1000 --treshold=0.9
No need for second refine due to stability of cross-section
INFO: Combining Events 
combination of events done in 0.47744202613830566 s 
  === Results Summary for run: run_01 tag: tag_1 ===

     Cross-section :   5172 +- 34.13 pb
     Nb of events :  1000
 
INFO: Running Systematics computation 
INFO: # Events generated with PDF: NNPDF23_lo_as_0130_qed (247000) 
INFO: # Will Compute 145 weights per event. 
INFO: # Currently at event 0 [elapsed time: 0.0024 s] 
INFO: #***************************************************************************
#
# original cross-section: 5171.599000000036
#     scale variation: +18.1% -15.6%
#     central scheme variation: +2.88% -5.74%
# PDF variation: +1.75% -1.75%
#
# dynamical scheme # 1 : 5127.56 +17.9% -15.4% # \sum ET
# dynamical scheme # 2 : 5017.46 +17.5% -15.1% # \sum\sqrt{m^2+pt^2}
# dynamical scheme # 3 : 5320.54 +21.4% -18.2% # 0.5 \sum\sqrt{m^2+pt^2}
# dynamical scheme # 4 : 4874.76 +15.9% -13.8% # \sqrt{\hat s}
#***************************************************************************
 
INFO: End of systematics computation 
store_events
INFO: Storing parton level results 
INFO: End Parton 
reweight -from_cards
decay_events -from_cards
INFO: �[92mRunning Pythia8 [arXiv:1410.3012]�[0m 
Splitting .lhe event file for PY8 parallelization...
Submitting Pythia8 jobs...
Pythia8 shower jobs: 1 Idle, 7 Running, 0 Done [0 second]
/private/tmp/example/MY_FIRST_MG5_RUN/Events/run_01/PY8_parallelization/split_3/run_PY8.sh: line 2: 83167 Abort trap: 6           ./MG5aMC_PY8_interface PY8Card.dat >&PY8_log.txt
/private/tmp/example/MY_FIRST_MG5_RUN/Events/run_01/PY8_parallelization/split_0/run_PY8.sh: line 2: 83172 Abort trap: 6           ./MG5aMC_PY8_interface PY8Card.dat >&PY8_log.txt
/private/tmp/example/MY_FIRST_MG5_RUN/Events/run_01/PY8_parallelization/split_4/run_PY8.sh: line 2: 83173 Abort trap: 6           ./MG5aMC_PY8_interface PY8Card.dat >&PY8_log.txt
/private/tmp/example/MY_FIRST_MG5_RUN/Events/run_01/PY8_parallelization/split_5/run_PY8.sh: line 2: 83168 Abort trap: 6           ./MG5aMC_PY8_interface PY8Card.dat >&PY8_log.txt
/private/tmp/example/MY_FIRST_MG5_RUN/Events/run_01/PY8_parallelization/split_2/run_PY8.sh: line 2: 83171 Abort trap: 6           ./MG5aMC_PY8_interface PY8Card.dat >&PY8_log.txt
/private/tmp/example/MY_FIRST_MG5_RUN/Events/run_01/PY8_parallelization/split_6/run_PY8.sh: line 2: 83174 Abort trap: 6           ./MG5aMC_PY8_interface PY8Card.dat >&PY8_log.txt
/private/tmp/example/MY_FIRST_MG5_RUN/Events/run_01/PY8_parallelization/split_7/run_PY8.sh: line 2: 83169 Abort trap: 6           ./MG5aMC_PY8_interface PY8Card.dat >&PY8_log.txt
/private/tmp/example/MY_FIRST_MG5_RUN/Events/run_01/PY8_parallelization/split_1/run_PY8.sh: line 2: 83170 Abort trap: 6           ./MG5aMC_PY8_interface PY8Card.dat >&PY8_log.txt
�[1;34mWARNING: program /private/tmp/example/MY_FIRST_MG5_RUN/Events/run_01/PY8_parallelization/split_0/run_PY8.sh 0 launch ends with non zero status: 134. Stop all computation �[0m
Pythia8 shower jobs: 0 Idle, 7 Running, 1 Done [1 seconds]
Pythia8 shower jobs: 0 Idle, 1 Running, 7 Done [1 seconds]
Pythia8 shower jobs: 0 Idle, 0 Running, 8 Done [1 seconds]
�[1;31mCommand "generate_events run_01" interrupted with error:
Exception : program /private/tmp/example/MY_FIRST_MG5_RUN/Events/run_01/PY8_parallelization/split_0/run_PY8.sh 0 launch ends with non zero status: 134. Stop all computation
Please report this bug on https://bugs.launchpad.net/mg5amcnlo
More information is found in '/private/tmp/example/MY_FIRST_MG5_RUN/run_01_tag_1_debug.log'.
Please attach this file to your report.�[0m
INFO: storing files of previous run 
INFO: Done 
INFO:  
INFO:  
quit
INFO:  
quit

Manually invoking ./MG5aMC_PY8_interface shows that symlinking of the $CONDA_PREFIX/lib/libpythia8.dylib isn't getting picked up correctly

% ./MG5aMC_PY8_interface PY8Card.dat
dyld[38454]: Library not loaded: @rpath/libpythia8.dylib
  Referenced from: <09AA946C-1708-37C0-AF24-0D695354A2D8> /private/tmp/example/MY_FIRST_MG5_RUN/Events/run_01/PY8_parallelization/MG5aMC_PY8_interface
  Reason: tried: '/private/tmp/example/MY_FIRST_MG5_RUN/Events/run_01/PY8_parallelization/../../../lib/libpythia8.dylib' (no such file), '/private/tmp/example/MY_FIRST_MG5_RUN/Events/run_01/PY8_parallelization/../../../lib/libpythia8.dylib' (no such file), '/usr/local/lib/libpythia8.dylib' (no such file), '/usr/lib/libpythia8.dylib' (no such file, not in dyld cache)
zsh: abort      ./MG5aMC_PY8_interface PY8Card.dat

Installed packages

Package                      Version       Build                 Size       Kind   Source
bc                           1.07.1        h3422bc3_0            107.1 KiB  conda  bc
bzip2                        1.0.8         h99b78c6_7            120 KiB    conda  bzip2
c-compiler                   1.9.0         hdf49b6b_0            6.1 KiB    conda  c-compiler
ca-certificates              2025.1.31     hf0a4a13_0            154.7 KiB  conda  ca-certificates
cairo                        1.18.2        h6a3b0d2_1            873.6 KiB  conda  cairo
cctools                      1010.6        hb4fb6a3_3            20.8 KiB   conda  cctools
cctools_osx-arm64            1010.6        h3b4f5d3_3            1.1 MiB    conda  cctools_osx-arm64
clang                        18.1.8        default_h474c9e2_7    69.4 KiB   conda  clang
clang-18                     18.1.8        default_hf90f093_7    788.3 KiB  conda  clang-18
clang_impl_osx-arm64         18.1.8        h2ae9ea5_23           17.5 KiB   conda  clang_impl_osx-arm64
clang_osx-arm64              18.1.8        h07b0088_23           20.6 KiB   conda  clang_osx-arm64
clangxx                      18.1.8        default_h1ffe849_7    69.5 KiB   conda  clangxx
clangxx_impl_osx-arm64       18.1.8        h555f467_23           17.5 KiB   conda  clangxx_impl_osx-arm64
clangxx_osx-arm64            18.1.8        h07b0088_23           19 KiB     conda  clangxx_osx-arm64
collier-static               1.2.8         h8275ae6_5            1.5 MiB    conda  collier-static
compiler-rt                  18.1.8        h856b3c1_1            93.2 KiB   conda  compiler-rt
compiler-rt_osx-arm64        18.1.8        h832e737_1            10.1 MiB   conda  compiler-rt_osx-arm64
cxx-compiler                 1.9.0         hba80287_0            6.1 KiB    conda  cxx-compiler
cyrus-sasl                   2.1.27        h60b93bd_7            206 KiB    conda  cyrus-sasl
emela                        1.0           hfebd03e_2            138.2 KiB  conda  emela
fastjet-contrib              1.100         hfd5c3aa_1            356.8 KiB  conda  fastjet-contrib
fastjet-cxx                  3.4.3         h2c4a281_1            642.3 KiB  conda  fastjet-cxx
ff-static                    2.0.1         h5773a5b_0            548 KiB    conda  ff-static
font-ttf-dejavu-sans-mono    2.37          hab24e00_0            388.1 KiB  conda  font-ttf-dejavu-sans-mono
font-ttf-inconsolata         3.000         h77eed37_0            94.3 KiB   conda  font-ttf-inconsolata
font-ttf-source-code-pro     2.038         h77eed37_0            684.4 KiB  conda  font-ttf-source-code-pro
font-ttf-ubuntu              0.83          h77eed37_3            1.5 MiB    conda  font-ttf-ubuntu
fontconfig                   2.15.0        h1383a14_1            228.7 KiB  conda  fontconfig
fonts-conda-ecosystem        1             0                     3.6 KiB    conda  fonts-conda-ecosystem
fonts-conda-forge            1             0                     4 KiB      conda  fonts-conda-forge
fortran-compiler             1.9.0         h5692697_0            6.1 KiB    conda  fortran-compiler
freetype                     2.12.1        hadb7bae_2            582.5 KiB  conda  freetype
fribidi                      1.0.10        h27ca646_0            58.8 KiB   conda  fribidi
gettext                      0.23.1        h3dcc1bd_0            473.1 KiB  conda  gettext
gettext-tools                0.23.1        h493aca8_0            2.8 MiB    conda  gettext-tools
gfortran                     13.2.0        h1ca8e4b_1            31.2 KiB   conda  gfortran
gfortran_impl_osx-arm64      13.2.0        h252ada1_3            17.6 MiB   conda  gfortran_impl_osx-arm64
gfortran_osx-arm64           13.2.0        h57527a5_1            34.4 KiB   conda  gfortran_osx-arm64
ghostscript                  10.04.0       hf9b8971_0            56.5 MiB   conda  ghostscript
glib                         2.82.2        heee381b_1            573.7 KiB  conda  glib
glib-tools                   2.82.2        h1dc7a0c_1            98.6 KiB   conda  glib-tools
gmp                          6.3.0         h7bae524_2            356.6 KiB  conda  gmp
gnuplot                      5.4.10        h3922d9a_0            949.7 KiB  conda  gnuplot
graphite2                    1.3.13        hebf3989_1003         77.9 KiB   conda  graphite2
gst-plugins-base             1.24.7        hb49d354_0            1.9 MiB    conda  gst-plugins-base
gstreamer                    1.24.7        hc3f5269_0            1.3 MiB    conda  gstreamer
harfbuzz                     10.2.0        ha0dd535_0            1.4 MiB    conda  harfbuzz
hepmc2                       2.06.11       hf9b8971_3            1.3 MiB    conda  hepmc2
hepmc3                       3.3.0         py311h4e652ed_2       4.4 MiB    conda  hepmc3
icu                          75.1          hfee45f7_0            11.3 MiB   conda  icu
iregi-static                 1.1.0         hedc7eab_2            813.9 KiB  conda  iregi-static
isl                          0.26          imath32_h347afa1_101  800.7 KiB  conda  isl
krb5                         1.21.3        h237132a_0            1.1 MiB    conda  krb5
ld64                         951.9         h4c6efb1_3            18.2 KiB   conda  ld64
ld64_osx-arm64               951.9         hb6b49e2_3            994.2 KiB  conda  ld64_osx-arm64
lerc                         4.0.0         h9a09cb3_0            210.7 KiB  conda  lerc
lhapdf                       6.5.5         py311h6dccdbe_0       816.9 KiB  conda  lhapdf
libasprintf                  0.23.1        h493aca8_0            40.7 KiB   conda  libasprintf
libasprintf-devel            0.23.1        h493aca8_0            33.8 KiB   conda  libasprintf-devel
libblas                      3.9.0         30_h10e41b3_openblas  16.6 KiB   conda  libblas
libboost                     1.84.0        hc9fb7c5_7            1.8 MiB    conda  libboost
libcblas                     3.9.0         30_hb3479ef_openblas  16.5 KiB   conda  libcblas
libclang-cpp17               17.0.6        default_hf90f093_8    12.2 MiB   conda  libclang-cpp17
libclang-cpp18.1             18.1.8        default_hf90f093_7    12.7 MiB   conda  libclang-cpp18.1
libclang13                   19.1.7        default_h81d93ff_1    8.1 MiB    conda  libclang13
libcxx                       19.1.7        ha82da77_0            511.2 KiB  conda  libcxx
libcxx-devel                 18.1.8        h6dc3340_7            774.7 KiB  conda  libcxx-devel
libdeflate                   1.23          hec38601_0            52.9 KiB   conda  libdeflate
libedit                      3.1.20250104  pl5321hafb1f1b_0      105.2 KiB  conda  libedit
libexpat                     2.6.4         h286801f_0            63.2 KiB   conda  libexpat
libffi                       3.4.2         h3422bc3_5            38.1 KiB   conda  libffi
libgd                        2.3.3         hb2c3a21_11           153.2 KiB  conda  libgd
libgettextpo                 0.23.1        h493aca8_0            163 KiB    conda  libgettextpo
libgettextpo-devel           0.23.1        h493aca8_0            36.4 KiB   conda  libgettextpo-devel
libgfortran                  5.0.0         13_2_0_hd922786_3     107.6 KiB  conda  libgfortran
libgfortran-devel_osx-arm64  13.2.0        h5d7a38c_3            1.9 MiB    conda  libgfortran-devel_osx-arm64
libgfortran5                 13.2.0        hf226fd6_3            974 KiB    conda  libgfortran5
libglib                      2.82.2        hdff4504_1            3.5 MiB    conda  libglib
libiconv                     1.18          hfe07756_0            663.5 KiB  conda  libiconv
libidn2                      2.3.7         h93a5062_0            131.3 KiB  conda  libidn2
libintl                      0.23.1        h493aca8_0            77.1 KiB   conda  libintl
libintl-devel                0.23.1        h493aca8_0            38.8 KiB   conda  libintl-devel
libjpeg-turbo                3.0.0         hb547adb_1            534.7 KiB  conda  libjpeg-turbo
liblapack                    3.9.0         30_hc9a63f6_openblas  16.5 KiB   conda  liblapack
libllvm17                    17.0.6        hc4b4ae8_3            23.7 MiB   conda  libllvm17
libllvm18                    18.1.8        hc4b4ae8_3            24.8 MiB   conda  libllvm18
libllvm19                    19.1.7        hc4b4ae8_1            25.8 MiB   conda  libllvm19
liblzma                      5.6.4         h39f12f2_0            96.6 KiB   conda  liblzma
libntlm                      1.8           h5505292_0            30.4 KiB   conda  libntlm
libogg                       1.3.5         h99b78c6_0            200.6 KiB  conda  libogg
libopenblas                  0.3.29        openmp_hf332438_0     4 MiB      conda  libopenblas
libopus                      1.3.1         h27ca646_1            246.9 KiB  conda  libopus
libpng                       1.6.47        h3783ad8_0            253.3 KiB  conda  libpng
libpq                        17.3          h6896619_0            2.5 MiB    conda  libpq
libsqlite                    3.49.1        h3f77e49_1            877.7 KiB  conda  libsqlite
libtiff                      4.7.0         h551f018_3            361.9 KiB  conda  libtiff
libunistring                 0.9.10        h3422bc3_0            1.5 MiB    conda  libunistring
libvorbis                    1.3.7         h9f76cd9_0            248.9 KiB  conda  libvorbis
libwebp-base                 1.5.0         h2471fea_0            283.2 KiB  conda  libwebp-base
libxml2                      2.13.6        h178c5d8_0            569.7 KiB  conda  libxml2
libzlib                      1.3.1         h8359307_2            45.3 KiB   conda  libzlib
llvm-openmp                  19.1.7        hdb05f8b_0            274.2 KiB  conda  llvm-openmp
llvm-tools                   18.1.8        hc4b4ae8_3            86 KiB     conda  llvm-tools
llvm-tools-18                18.1.8        hc4b4ae8_3            22.5 MiB   conda  llvm-tools-18
make                         4.4.1         hc9fafa5_2            267.6 KiB  conda  make
mg5amcnlo                    3.5.7         py311ha617b18_3       17.9 MiB   conda  mg5amcnlo
mpc                          1.3.1         h8f1351a_1            102.3 KiB  conda  mpc
mpfr                         4.2.1         hb693164_3            337.4 KiB  conda  mpfr
mysql-common                 9.0.1         hd7719f6_4            626.5 KiB  conda  mysql-common
mysql-libs                   9.0.1         ha8be5b7_4            1.3 MiB    conda  mysql-libs
ncurses                      6.5           h5e97a16_3            778.3 KiB  conda  ncurses
nspr                         4.36          h5833ebf_0            198.1 KiB  conda  nspr
nss                          3.108         ha3c76ea_0            1.7 MiB    conda  nss
numpy                        2.2.3         py311h762c074_0       6.8 MiB    conda  numpy
oneloop-static               3.7.2         hedc7eab_2            940.2 KiB  conda  oneloop-static
openldap                     2.6.9         hbe55e7a_0            822.8 KiB  conda  openldap
openssl                      3.4.1         h81ee809_0            2.8 MiB    conda  openssl
packaging                    24.2          pyhd8ed1ab_2          58.8 KiB   conda  packaging
pango                        1.56.1        h73f1e88_0            414 KiB    conda  pango
pcre2                        10.44         h297a79d_2            604.5 KiB  conda  pcre2
perl                         5.32.1        7_h4614cfb_perl5      13.8 MiB   conda  perl
pixman                       0.44.2        h2f9eb0b_0            196.4 KiB  conda  pixman
ply                          3.11          pyhd8ed1ab_3          47.9 KiB   conda  ply
pythia8                      8.311         py311h3b0184f_7       18.3 MiB   conda  pythia8
python                       3.11.11       hc22306f_1_cpython    14 MiB     conda  python
python_abi                   3.11          5_cp311               6.2 KiB    conda  python_abi
qcdloop-fortran-static       1.98          h5773a5b_1            50.1 KiB   conda  qcdloop-fortran-static
qt-main                      5.15.15       h67564f6_2            48.1 MiB   conda  qt-main
readline                     8.2           h92ec313_1            244.5 KiB  conda  readline
sigtool                      0.1.3         h44b9a77_0            205.3 KiB  conda  sigtool
siscone                      3.0.6         h2c4a281_1            130.3 KiB  conda  siscone
six                          1.17.0        pyhd8ed1ab_0          16 KiB     conda  six
tapi                         1300.6.5      h03f4b80_0            202.8 KiB  conda  tapi
tar                          1.34          h7cb298e_1            413.9 KiB  conda  tar
tk                           8.6.13        h5083fa2_1            3 MiB      conda  tk
tzdata                       2025a         h78e105d_0            120 KiB    conda  tzdata
wget                         1.21.4        he2df1f1_0            758.9 KiB  conda  wget
zlib                         1.3.1         h8359307_2            75.8 KiB   conda  zlib
zstd                         1.5.6         hb46c0d2_0            395.6 KiB  conda  zstd

Environment info

System
------------
       Pixi version: 0.41.3
           Platform: osx-arm64
   Virtual packages: __unix=0=0
                   : __osx=14.7=0
                   : __archspec=1=m2
          Cache dir: /Users/feickert/Library/Caches/rattler/cache
       Auth storage: /Users/feickert/.rattler/credentials.json
   Config locations: No config files found

Global
------------
            Bin dir: /Users/feickert/.pixi/bin
    Environment dir: /Users/feickert/.pixi/envs
       Manifest dir: /Users/feickert/.pixi/manifests/pixi-global.toml

Project
------------
               Name: example
            Version: 0.1.0
      Manifest file: /private/tmp/example/pixi.toml
       Last updated: 19-02-2025 11:11:06

Environments
------------
        Environment: default
           Features: default
           Channels: conda-forge
   Dependency count: 1
       Dependencies: mg5amcnlo
   Target platforms: osx-arm64

[matthewfeickert]

From an example from @andrzejnovak, I see that this is now not working for linux-64 too.

He was using

$ pixi init example
$ cd example
$ pixi config set --local run-post-link-scripts insecure
$ pixi add mg5amcnlo delphes
$ pixi list | grep 'mg5amcnlo\|pythia8\|delphes\|root'
delphes                    3.5.0         hc17c42c_4             2.2 MiB    conda  https://conda.anaconda.org/conda-forge/
mg5amcnlo                  3.5.7         py311hd817590_2        15.9 MiB   conda  https://conda.anaconda.org/conda-forge/
pythia8                    8.312         py311h09c63d4_104      20.5 MiB   conda  https://conda.anaconda.org/conda-forge/
root_base                  6.34.4        np20py311h083d4c6_0    235.9 MiB  conda  https://conda.anaconda.org/conda-forge/
sysroot_linux-64           2.17          h0157908_18            14.5 MiB   conda  https://conda.anaconda.org/conda-forge/
xrootd                     5.8.1         py311h2e3e170_0        3.9 MiB    conda  https://conda.anaconda.org/conda-forge/

and editing .pixi/envs/default/MG5_aMC/input/mg5_configuration.txt to have

$ grep "pythia8_path" .pixi/envs/default/MG5_aMC/input/mg5_configuration.txt
pythia8_path = /example/.pixi/envs/default #  
$ grep "delphes_path" .pixi/envs/default/MG5_aMC/input/mg5_configuration.txt
delphes_path = /example/.pixi/envs/default/bin # 

However, when then using the following mg5amcnlo card test.mg5

set auto_update 0

set group_subprocesses Auto
set ignore_six_quark_processes False
set low_mem_multicore_nlo_generation False
set complex_mass_scheme False
set include_lepton_initiated_processes False
set gauge unitary
set loop_optimized_output True
set loop_color_flows False
set max_npoint_for_channel 0
set default_unset_couplings 99
set max_t_for_channel 99
set zerowidth_tchannel True
set nlo_mixed_expansion True
import model sm
define p = g u c d s u~ c~ d~ s~
define j = g u c d s u~ c~ d~ s~
define l+ = e+ mu+
define l- = e- mu-
define vl = ve vm vt
define vl~ = ve~ vm~ vt~
import model heft
define p = p b b~
define j = j b b~
generate p p > ve ve~ h, h > b b~

output test

launch test
  shower=Pythia8
  detector=Delphes

then

pixi run mg5_aMC test.mg5

errors with

Command "generate_events run_01" interrupted with error:
InvalidCmd : The MG5aMC_PY8_interface tool cannot be found, so that MadEvent cannot steer Pythia8 shower.
	Please install this tool with the following MG5_aMC command:
	  MG5_aMC> install mg5amc_py8_interface_path

Full run log:

$ rm -rf test && pixi run mg5_aMC test.mg5
************************************************************
*                                                          *
*                     W E L C O M E to                     *
*              M A D G R A P H 5 _ a M C @ N L O           *
*                                                          *
*                                                          *
*                 *                       *                *
*                   *        * *        *                  *
*                     * * * * 5 * * * *                    *
*                   *        * *        *                  *
*                 *                       *                *
*                                                          *
*         VERSION 3.5.7                 2024-11-29         *
*                                                          *
*    The MadGraph5_aMC@NLO Development Team - Find us at   *
*              http://madgraph.phys.ucl.ac.be/             *
*                            and                           *
*            http://amcatnlo.web.cern.ch/amcatnlo/         *
*                                                          *
*               Type 'help' for in-line help.              *
*           Type 'tutorial' to learn how MG5 works         *
*    Type 'tutorial aMCatNLO' to learn how aMC@NLO works   *
*    Type 'tutorial MadLoop' to learn how MadLoop works    *
*                                                          *
************************************************************
load MG5 configuration from .pixi/envs/default/MG5_aMC/input/mg5_configuration.txt 
set fastjet to fastjet-config
set eMELA to eMELA-config
set lhapdf to /example/.pixi/envs/default/bin/lhapdf-config
set lhapdf to /example/.pixi/envs/default/bin/lhapdf-config

    A Pythia8 path is specified via the option 'pythia8_path' but no path for option
    'mg5amc_py8_interface_path' is specified. This means that Pythia8 cannot be used
    leading order simulations with MadEvent.
    Consider installing the MG5_aMC-PY8 interface with the following command:
     MG5_aMC>install mg5amc_py8_interface
    
Using default text editor "vim". Set another one in ./input/mg5_configuration.txt
No valid web browser found. Please set in ./input/mg5_configuration.txt
import /example/test.mg5
The import format was not given, so we guess it as command
set auto_update 0
save options auto_update
save configuration file to /example/.pixi/envs/default/MG5_aMC/input/mg5_configuration.txt
set group_subprocesses Auto
Set group_subprocesses to Auto
Note that you need to regenerate all processes
set ignore_six_quark_processes False
set low_mem_multicore_nlo_generation False
set complex_mass_scheme False
Complex mass already desactivated.
set include_lepton_initiated_processes False
set gauge unitary
Passing to gauge unitary.
set loop_optimized_output True
set loop optimized output to True
set loop_color_flows False
set loop color flows to False
set max_npoint_for_channel 0
set default_unset_couplings 99
set max_t_for_channel 99
set zerowidth_tchannel True
set nlo_mixed_expansion True
import model sm
INFO: Restrict model sm with file .pixi/envs/default/MG5_aMC/models/sm/restrict_default.dat . 
INFO: Run "set stdout_level DEBUG" before import for more information. 
INFO: Change particles name to pass to MG5 convention 
Defined multiparticle p = g u c d s u~ c~ d~ s~
Defined multiparticle j = g u c d s u~ c~ d~ s~
Defined multiparticle l+ = e+ mu+
Defined multiparticle l- = e- mu-
Defined multiparticle vl = ve vm vt
Defined multiparticle vl~ = ve~ vm~ vt~
Defined multiparticle all = g u c d s u~ c~ d~ s~ a ve vm vt e- mu- ve~ vm~ vt~ e+ mu+ t b t~ b~ z w+ h w- ta- ta+
define p = g u c d s u~ c~ d~ s~
Defined multiparticle p = g u c d s u~ c~ d~ s~
define j = g u c d s u~ c~ d~ s~
Defined multiparticle j = g u c d s u~ c~ d~ s~
define l+ = e+ mu+
Defined multiparticle l+ = e+ mu+
define l- = e- mu-
Defined multiparticle l- = e- mu-
define vl = ve vm vt
Defined multiparticle vl = ve vm vt
define vl~ = ve~ vm~ vt~
Defined multiparticle vl~ = ve~ vm~ vt~
import model heft
INFO: Restrict model heft with file .pixi/envs/default/MG5_aMC/models/heft/restrict_default.dat . 
INFO: Run "set stdout_level DEBUG" before import for more information. 
INFO: Change particles name to pass to MG5 convention 
Kept definitions of multiparticles p / j / l+ / l- / vl / vl~ unchanged
Defined multiparticle all = g u c d s u~ c~ d~ s~ a ve vm vt e- mu- ve~ vm~ vt~ e+ mu+ t b t~ b~ z w+ h h1 w- ta- ta+
define p = p b b~
Defined multiparticle p = g u c d s u~ c~ d~ s~ b b~
define j = j b b~
Defined multiparticle j = g u c d s u~ c~ d~ s~ b b~
generate p p > ve ve~ h, h > b b~
INFO: Checking for minimal orders which gives processes. 
INFO: Please specify coupling orders to bypass this step. 
INFO: Trying process: g g > ve ve~ h HIG<=1 HIW<=1 WEIGHTED<=6 @1  
INFO: Trying process: u u~ > ve ve~ h HIG<=1 HIW<=1 WEIGHTED<=6 @1  
INFO: Process has 1 diagrams 
INFO: Trying process: u c~ > ve ve~ h HIG<=1 HIW<=1 WEIGHTED<=6 @1  
INFO: Trying process: c u~ > ve ve~ h HIG<=1 HIW<=1 WEIGHTED<=6 @1  
INFO: Trying process: c c~ > ve ve~ h HIG<=1 HIW<=1 WEIGHTED<=6 @1  
INFO: Process has 1 diagrams 
INFO: Trying process: d d~ > ve ve~ h HIG<=1 HIW<=1 WEIGHTED<=6 @1  
INFO: Process has 1 diagrams 
INFO: Trying process: d s~ > ve ve~ h HIG<=1 HIW<=1 WEIGHTED<=6 @1  
INFO: Trying process: d b~ > ve ve~ h HIG<=1 HIW<=1 WEIGHTED<=6 @1  
INFO: Trying process: s d~ > ve ve~ h HIG<=1 HIW<=1 WEIGHTED<=6 @1  
INFO: Trying process: s s~ > ve ve~ h HIG<=1 HIW<=1 WEIGHTED<=6 @1  
INFO: Process has 1 diagrams 
INFO: Trying process: s b~ > ve ve~ h HIG<=1 HIW<=1 WEIGHTED<=6 @1  
INFO: Process u~ u > ve ve~ h added to mirror process u u~ > ve ve~ h 
INFO: Process c~ c > ve ve~ h added to mirror process c c~ > ve ve~ h 
INFO: Process d~ d > ve ve~ h added to mirror process d d~ > ve ve~ h 
INFO: Trying process: d~ b > ve ve~ h HIG<=1 HIW<=1 WEIGHTED<=6 @1  
INFO: Process s~ s > ve ve~ h added to mirror process s s~ > ve ve~ h 
INFO: Trying process: s~ b > ve ve~ h HIG<=1 HIW<=1 WEIGHTED<=6 @1  
INFO: Trying process: b b~ > ve ve~ h HIG<=1 HIW<=1 WEIGHTED<=6 @1  
INFO: Process has 3 diagrams 
INFO: Process b~ b > ve ve~ h added to mirror process b b~ > ve ve~ h 
INFO: Checking for minimal orders which gives processes. 
INFO: Please specify coupling orders to bypass this step. 
INFO: Trying process: h > b b~ HIG<=1 HIW<=1 WEIGHTED<=2  
INFO: Process has 1 diagrams 
1 processes with 8 diagrams generated in 0.019 s
Total: 1 processes with 8 diagrams
output test
INFO: initialize a new directory: test 
INFO: remove old information in test 
/usr/bin/env: ‘perl -w’: No such file or directory
/usr/bin/env: use -[v]S to pass options in shebang lines
INFO: Organizing processes into subprocess groups 
INFO: Organizing processes into subprocess groups 
INFO: Generating Helas calls for process: u u~ > ve ve~ h HIG<=1 HIW<=1 WEIGHTED<=6 @1 
INFO: Combined process c c~ > ve ve~ h HIG<=1 HIW<=1 WEIGHTED<=6 @1 with process u u~ > ve ve~ h HIG<=1 HIW<=1 WEIGHTED<=6 @1 
INFO: Generating Helas calls for process: d d~ > ve ve~ h HIG<=1 HIW<=1 WEIGHTED<=6 @1 
INFO: Combined process s s~ > ve ve~ h HIG<=1 HIW<=1 WEIGHTED<=6 @1 with process d d~ > ve ve~ h HIG<=1 HIW<=1 WEIGHTED<=6 @1 
INFO: Generating Helas calls for process: b b~ > ve ve~ h HIG<=1 HIW<=1 WEIGHTED<=6 @1 
INFO: Generating Helas calls for process: h > b b~ HIG<=1 HIW<=1 WEIGHTED<=2 
INFO: Combine u u~ > ve ve~ h HIG<=1 HIW<=1 WEIGHTED<=6 @1 with decays h > b b~ HIG<=1 HIW<=1 WEIGHTED<=2 
INFO: Combine d d~ > ve ve~ h HIG<=1 HIW<=1 WEIGHTED<=6 @1 with decays h > b b~ HIG<=1 HIW<=1 WEIGHTED<=2 
INFO: Combine b b~ > ve ve~ h HIG<=1 HIW<=1 WEIGHTED<=6 @1 with decays h > b b~ HIG<=1 HIW<=1 WEIGHTED<=2 
INFO: Processing color information for process: u u~ > ve ve~ h HIG<=1 HIW<=1 @1
  Decay: h > b b~ HIG<=1 HIW<=1 WEIGHTED<=2 
INFO: Reusing existing color information for process: d d~ > ve ve~ h HIG<=1 HIW<=1 @1
  Decay: h > b b~ HIG<=1 HIW<=1 WEIGHTED<=2 
INFO: Processing color information for process: b b~ > ve ve~ h HIG<=1 HIW<=1 @1
  Decay: h > b b~ HIG<=1 HIW<=1 WEIGHTED<=2 
INFO: Creating files in directory P1_qq_vlvlh_h_bbx 
INFO: Generating Feynman diagrams for Process: u u~ > ve ve~ h HIG<=1 HIW<=1 WEIGHTED<=6 @1
  Decay: h > b b~ HIG<=1 HIW<=1 WEIGHTED<=2 
INFO: Generating Feynman diagrams for Process: d d~ > ve ve~ h HIG<=1 HIW<=1 WEIGHTED<=6 @1
  Decay: h > b b~ HIG<=1 HIW<=1 WEIGHTED<=2 
INFO: Finding symmetric diagrams for subprocess group qq_vlvlh_h_bbx 
INFO: Creating files in directory P1_bbx_vlvlh_h_bbx 
INFO: Generating Feynman diagrams for Process: b b~ > ve ve~ h HIG<=1 HIW<=1 WEIGHTED<=6 @1
  Decay: h > b b~ HIG<=1 HIW<=1 WEIGHTED<=2 
INFO: Finding symmetric diagrams for subprocess group bbx_vlvlh_h_bbx 
Generated helas calls for 3 subprocesses (5 diagrams) in 0.014 s
Wrote files for 34 helas calls in 0.043 s
ALOHA: aloha starts to compute helicity amplitudes
ALOHA: aloha creates 5 routines in  0.463 s
save configuration file to /example/test/Cards/me5_configuration.txt
INFO: Use Fortran compiler /example/.pixi/envs/default/bin/x86_64-conda-linux-gnu-gfortran 
INFO: Use c++ compiler /example/.pixi/envs/default/bin/x86_64-conda-linux-gnu-g++ 
INFO: Generate jpeg diagrams 
/usr/bin/env: ‘perl -w’: No such file or directory
/usr/bin/env: use -[v]S to pass options in shebang lines
/usr/bin/env: ‘perl -w’: No such file or directory
/usr/bin/env: use -[v]S to pass options in shebang lines
INFO: Generate web pages 
/usr/bin/env: ‘perl -w’: No such file or directory
/usr/bin/env: use -[v]S to pass options in shebang lines
/usr/bin/env: ‘perl -w’: No such file or directory
/usr/bin/env: use -[v]S to pass options in shebang lines
/usr/bin/env: ‘perl -w’: No such file or directory
/usr/bin/env: use -[v]S to pass options in shebang lines
Output to directory /example/test done.
Type "launch" to generate events from this process, or see
/example/test/README
Run "open index.html" to see more information about this process.
launch test
************************************************************
*                                                          *
*                      W E L C O M E to                    *
*             M A D G R A P H 5 _ a M C @ N L O            *
*                      M A D E V E N T                     *
*                                                          *
*                 *                       *                *
*                   *        * *        *                  *
*                     * * * * 5 * * * *                    *
*                   *        * *        *                  *
*                 *                       *                *
*                                                          *
*         VERSION 3.5.7                 2024-11-29         *
*                                                          *
*    The MadGraph5_aMC@NLO Development Team - Find us at   *
*    https://server06.fynu.ucl.ac.be/projects/madgraph     *
*                                                          *
*               Type 'help' for in-line help.              *
*                                                          *
************************************************************
INFO: load configuration from /example/test/Cards/me5_configuration.txt  
INFO: load configuration from /example/.pixi/envs/default/MG5_aMC/input/mg5_configuration.txt  
INFO: load configuration from /example/test/Cards/me5_configuration.txt  
INFO: set f2py compiler to /example/.pixi/envs/default/bin/f2py 
INFO: set f2py compiler to /example/.pixi/envs/default/bin/f2py 
Using default text editor "vim". Set another one in ./input/mg5_configuration.txt
No valid web browser found. Please set in ./input/mg5_configuration.txt
save configuration file to /example/.pixi/envs/default/MG5_aMC/input/mg5_configuration.txt
generate_events run_01
The following switches determine which programs are run:
/=================== Description ===================|============= values ==============|======== other options ========\
| 1. Choose the shower/hadronization program        |        shower = OFF               |     Pythia8                   |
| 2. Choose the detector simulation program         |      detector = OFF               |     Delphes                   |
| 3. Choose an analysis package (plot/convert)      |      analysis = Not Avail.        |     Please install module     |
| 4. Decay onshell particles                        |       madspin = OFF               |     ON|onshell|full           |
| 5. Add weights to events for new hypp.            |      reweight = OFF               |     ON                        |
\=======================================================================================================================/
Either type the switch number (1 to 5) to change its setting,
Set any switch explicitly (e.g. type 'shower=Pythia8' at the prompt)
Type 'help' for the list of all valid option
Type '0', 'auto', 'done' or just press enter when you are done.
The following switches determine which programs are run:
/=================== Description ===================|============= values ==============|======== other options ========\
| 1. Choose the shower/hadronization program        |        shower = OFF               |     Pythia8                   |
| 2. Choose the detector simulation program         |      detector = OFF               |     Delphes                   |
| 3. Choose an analysis package (plot/convert)      |      analysis = Not Avail.        |     Please install module     |
| 4. Decay onshell particles                        |       madspin = OFF               |     ON|onshell|full           |
| 5. Add weights to events for new hypp.            |      reweight = OFF               |     ON                        |
\=======================================================================================================================/
Either type the switch number (1 to 5) to change its setting,
Set any switch explicitly (e.g. type 'shower=Pythia8' at the prompt)
Type 'help' for the list of all valid option
Type '0', 'auto', 'done' or just press enter when you are done.
The following switches determine which programs are run:
/=================== Description ===================|============= values ==============|======== other options ========\
| 1. Choose the shower/hadronization program        |        shower = OFF               |     Pythia8                   |
| 2. Choose the detector simulation program         |      detector = OFF               |     Delphes                   |
| 3. Choose an analysis package (plot/convert)      |      analysis = Not Avail.        |     Please install module     |
| 4. Decay onshell particles                        |       madspin = OFF               |     ON|onshell|full           |
| 5. Add weights to events for new hypp.            |      reweight = OFF               |     ON                        |
\=======================================================================================================================/
Either type the switch number (1 to 5) to change its setting,
Set any switch explicitly (e.g. type 'shower=Pythia8' at the prompt)
Type 'help' for the list of all valid option
Type '0', 'auto', 'done' or just press enter when you are done.
The answer to the previous question is not set in your input file
Use EOF value
Do you want to edit a card (press enter to bypass editing)?
/------------------------------------------------------------\
|  1. param   : param_card.dat                               |
|  2. run     : run_card.dat                                 |
|  3. pythia8 : pythia8_card.dat                             |
|  4. delphes : delphes_card.dat                             |
\------------------------------------------------------------/
 you can also
   - enter the path to a valid card or banner.
   - use the 'set' command to modify a parameter directly.
     The set option works only for param_card and run_card.
     Type 'help set' for more information on this command.
   - call an external program (ASperGE/MadWidth/...).
     Type 'help' for the list of available command
 [0, done, 1, param, 2, run, 3, pythia8, 4, enter path, ... ]
The answer to the previous question is not set in your input file
Use 0 value
INFO: Update the dependent parameter of the param_card.dat 
WARNING: update the strong coupling value (alpha_s) to the value from the pdf selected: 0.13 
Generating 10000 events with run name run_01
survey  run_01 
INFO: compile directory 
Not able to open file /example/test/crossx.html since no program configured.Please set one in ./input/mg5_configuration.txt
compile Source Directory
Using random number seed offset = 21
INFO: Running Survey 
Creating Jobs
Working on SubProcesses
INFO: Compiling for process 1/2. 
INFO:     P1_qq_vlvlh_h_bbx  
INFO: Compiling for process 2/2. 
INFO:     P1_bbx_vlvlh_h_bbx  
INFO:     P1_qq_vlvlh_h_bbx  
INFO:     P1_bbx_vlvlh_h_bbx  
INFO:  Idle: 1,  Running: 4,  Completed: 0 [ current time: 14h48 ] 
INFO:  Idle: 0,  Running: 4,  Completed: 1 [ current time: 14h48 ] 
INFO:  Idle: 0,  Running: 0,  Completed: 5 [  0.42s  ] 
INFO: End survey 
refine 10000
Creating Jobs
INFO: Refine results to 10000 
INFO: Generating 10000.0 unweighted events. 
sum of cpu time of last step: 2 seconds
INFO: Effective Luminosity 456914.9392680086 pb^-1 
INFO: need to improve 2 channels 
- Current estimate of cross-section: 0.026263094 +- 0.00022513299727910566
    P1_qq_vlvlh_h_bbx 
    P1_bbx_vlvlh_h_bbx 
INFO:  Idle: 0,  Running: 13,  Completed: 0 [ current time: 14h48 ] 
INFO:  Idle: 0,  Running: 0,  Completed: 13 [  0.83s  ] 
INFO: Combining runs 
sum of cpu time of last step: 12 seconds
INFO: finish refine 
refine 10000 --treshold=0.9
No need for second refine due to stability of cross-section
INFO: Combining Events 
combination of events done in 2.67313551902771 s 
  === Results Summary for run: run_01 tag: tag_1 ===

     Cross-section :   0.0261 +- 5.496e-05 pb
     Nb of events :  10000
 
INFO: Running Systematics computation 
INFO:  Idle: 3,  Running: 1,  Completed: 0 [ current time: 14h49 ] 
INFO:  Idle: 0,  Running: 3,  Completed: 1 [  5.2s  ] 
INFO: # Events generated with PDF: NNPDF23_lo_as_0130_qed (247000) 
INFO: # Will Compute 145 weights per event. 
INFO: #***************************************************************************
#
# original cross-section: 0.02609316683266536
#     scale variation: +2.75% -3.54%
#     central scheme variation: +0.399% -4.73%
# PDF variation: +3.06% -3.06%
#
# dynamical scheme # 1 : 0.0258589 +3.03% -3.88% # \sum ET
# dynamical scheme # 2 : 0.0258613 +3.03% -3.87% # \sum\sqrt{m^2+pt^2}
# dynamical scheme # 3 : 0.0248596 +4.03% -5.04% # 0.5 \sum\sqrt{m^2+pt^2}
# dynamical scheme # 4 : 0.0261974 +2.7% -3.49% # \sqrt{\hat s}
#***************************************************************************
 
INFO: End of systematics computation 
store_events
INFO: Storing parton level results 
INFO: End Parton 
reweight -from_cards
decay_events -from_cards
Command "generate_events run_01" interrupted with error:
InvalidCmd : The MG5aMC_PY8_interface tool cannot be found, so that MadEvent cannot steer Pythia8 shower.
	Please install this tool with the following MG5_aMC command:
	  MG5_aMC> install mg5amc_py8_interface_path
INFO: storing files of previous run 
INFO: Done 
INFO:  
quit
INFO:  
more information in /example/test/index.html
quit

[matthewfeickert]

The reason @andrzejnovak's example is broken even though I fixed this in PR #6 is that

mg5amcnlo-feedstock/recipe/meta.yaml

Lines 219 to 221 in a4bd3a9

	# mg5amcnlo v3.5.7 requires pythia v8.311 for MG5aMC_PY8_interface to work
	# without edits to compile.py
	- pythia8 8.311.*

and the current builds of Delphes don't support pythia8 8.311

# pixi add mg5amcnlo delphes 'pythia8 8.311'
Error:   x failed to solve the conda requirements of 'default' 'linux-64'
  `-> Cannot solve the request because of: delphes * cannot be installed because there are no viable options:
      └─ delphes 3.5.0 | 3.5.0 | 3.5.0 | 3.5.0 | 3.5.0 | 3.5.0 | 3.5.0 would require
         └─ pythia8 >=8.312,<8.400.0a0, for which no candidates were found.
      

This might be able to be fixed, but I'll have to check on the https://github.com/conda-forge/delphes-feedstock restrictions.

[matthewfeickert]

The original issue for osx-arm64 in #7 (comment) can be fixed after install by removing $CONDA_PREFIX/MG5_aMC/HEPTools/MG5aMC_PY8_interface/* and then recompiling the MG5aMC_PY8_interface and copying the output to $CONDA_PREFIX/MG5_aMC/HEPTools/MG5aMC_PY8_interface/.

[workspace]
channels = ["conda-forge"]
name = "mg5amcnlo-feedstock-issue-7"
platforms = ["osx-arm64", "linux-64"]
version = "0.1.0"

[tasks.patch]
cmd = """
rm -rf MG5aMC_PY8_interface-5d82df1b77bd2b69ffeae5b6bfe100a62b31c30e && \
curl -sL https://github.com/mg5amcnlo/MG5aMC_PY8_interface/archive/5d82df1b77bd2b69ffeae5b6bfe100a62b31c30e.tar.gz | tar -xz && \
cd MG5aMC_PY8_interface-5d82df1b77bd2b69ffeae5b6bfe100a62b31c30e && \
python compile.py $CONDA_PREFIX && \
cd .. && \
rm -rf $CONDA_PREFIX/MG5_aMC/HEPTools/MG5aMC_PY8_interface/* && \
cp MG5aMC_PY8_interface-5d82df1b77bd2b69ffeae5b6bfe100a62b31c30e/* $CONDA_PREFIX/MG5_aMC/HEPTools/MG5aMC_PY8_interface/
"""

[tasks.pythia-test]
cmd = """
rm -rf PYTHIA_MG5_RUN py.py && \
mg5_aMC ./tutorial.mg5
"""

[tasks.start]
depends-on = ["patch", "pythia-test"]

[dependencies]
mg5amcnlo = ">=3.5.7,<4"
curl = ">=8.14.1,<9"
tar = ">=1.35,<2"

pixi run clean && pixi run start 

...
------------------------------------------------
MG5aMC_PY8_interface compilation output log:
b"arm64-apple-darwin20.0.0-clang++ MG5aMC_PY8_interface.cc -o MG5aMC_PY8_interface -I/private/tmp/mg5amcnlo-feedstock-issue-7/.pixi/envs/default/include  -I/private/tmp/mg5amcnlo-feedstock-issue-7/.pixi/envs/default/include -O2 -std=c++11 -pedantic -W -Wall -Wshadow -fPIC -pthread -DGZIP -I/private/tmp/mg5amcnlo-feedstock-issue-7/.pixi/envs/default/include -L/private/tmp/mg5amcnlo-feedstock-issue-7/.pixi/envs/default/lib -Wl,-rpath,/private/tmp/mg5amcnlo-feedstock-issue-7/.pixi/envs/default/lib -lz -L/private/tmp/mg5amcnlo-feedstock-issue-7/.pixi/envs/default/lib -Wl,-rpath,/private/tmp/mg5amcnlo-feedstock-issue-7/.pixi/envs/default/lib -lpythia8 -ldl -L/private/tmp/mg5amcnlo-feedstock-issue-7/.pixi/envs/default/lib -Wl,-rpath,/private/tmp/mg5amcnlo-feedstock-issue-7/.pixi/envs/default/lib -lHepMC\nld: warning: duplicate -rpath '/private/tmp/mg5amcnlo-feedstock-issue-7/.pixi/envs/default/lib' ignored\nld: warning: duplicate -rpath '/private/tmp/mg5amcnlo-feedstock-issue-7/.pixi/envs/default/lib' ignored\n"
------------------------------------------------
Successful compilation of the MG5aMC_PY8_interface
...
INFO: Running Pythia8 [arXiv:1410.3012]
Splitting .lhe event file for PY8 parallelization...
Submitting Pythia8 jobs...
Pythia8 shower jobs: 1 Idle, 7 Running, 0 Done [0 second]
Pythia8 shower jobs: 0 Idle, 7 Running, 1 Done [22 seconds]
Pythia8 shower jobs: 0 Idle, 6 Running, 2 Done [23 seconds]
Pythia8 shower jobs: 0 Idle, 5 Running, 3 Done [23 seconds]
Pythia8 shower jobs: 0 Idle, 4 Running, 4 Done [23 seconds]
Pythia8 shower jobs: 0 Idle, 3 Running, 5 Done [24 seconds]
Pythia8 shower jobs: 0 Idle, 2 Running, 6 Done [24 seconds]
Pythia8 shower jobs: 0 Idle, 1 Running, 7 Done [24 seconds]
Pythia8 shower jobs: 0 Idle, 0 Running, 8 Done [25 seconds]
Merging results from the split PY8 runs...
INFO: Pythia8 shower finished after 26 seconds.
  === Results Summary for run: run_01 tag: tag_1 ===

     Cross-section :   5172 +- 34.13 pb
     Nb of events :  1000

INFO: storing files of previous run
INFO: Storing Pythia8 files of previous run
INFO: Done

So this means that

mg5amcnlo-feedstock/recipe/recipe.yaml

Lines 120 to 140 in b958fb2

	# Add MG5aMC_PY8_interface
	# https://github.com/mg5amcnlo/MG5aMC_PY8_interface
	# Need the CXX in Makefile.inc to be available _during_ the build, and so
	# need to inject the $BUILD_PREFIX CXX, but restore to the $PREFIX CXX
	# after so that at runtime the correct CXX is used.
	- cp $PREFIX/share/Pythia8/examples/Makefile.inc $PREFIX/share/Pythia8/examples/Makefile.inc.bak
	- sed -i "s|CXX=$PREFIX|CXX=$BUILD_PREFIX|" $PREFIX/share/Pythia8/examples/Makefile.inc
	- curl -sL https://github.com/mg5amcnlo/MG5aMC_PY8_interface/archive/5d82df1b77bd2b69ffeae5b6bfe100a62b31c30e.tar.gz | tar -xz
	- mv MG5aMC_PY8_interface-5d82df1b77bd2b69ffeae5b6bfe100a62b31c30e MG5aMC_PY8_interface
	- cd MG5aMC_PY8_interface
	- echo -e "\n# Compiling MG5aMC_PY8_interface"
	- python compile.py $PREFIX
	- mkdir -p $PREFIX/MG5_aMC/HEPTools/MG5aMC_PY8_interface
	- cd ..
	# TODO: Determine the minimum required set of files to install
	- cp MG5aMC_PY8_interface/* $PREFIX/MG5_aMC/HEPTools/MG5aMC_PY8_interface/
	- rm -rf MG5aMC_PY8_interface
	# Restore Makefile.inc
	- mv $PREFIX/share/Pythia8/examples/Makefile.inc.bak $PREFIX/share/Pythia8/examples/Makefile.inc

isn't working as intended and a new way to build the interface compiled to the right platform target is needed.

A self reminder is that the $PREFIX/share/Pythia8/examples/Makefile.inc is used during compile, and that contains platform specific compiler information

e.g.

...
# Compilation flags (see ./configure --help for further documentation).
CXX=arm64-apple-darwin20.0.0-clang++
CXX_COMMON=-O2 -std=c++11 -pedantic -W -Wall -Wshadow -fPIC -pthread -DGZIP -I/private/tmp/mg5-pythia-debug/.pixi/envs/default/include
CXX_SHARED=-dynamiclib
CXX_SONAME=-Wl,-dylib_install_name,@rpath/
LIB_SUFFIX=.dylib
OBJ_COMMON=
...

That will need to be determined and used, even if cross-compiling.

So my question is: In the build, how do I need to patch $PREFIX/share/Pythia8/examples/Makefile.inc so that when cross-compiling the target platform's compiler architecture is Makefile.inc is something that can be built? Similar to https://github.com/conda-forge/brev-feedstock/blob/a55e6bb88d8425d1c6368b0b84a4dceeaeadd9f9/recipe/recipe.yaml#L20-L33

Or do I just need to add pythia8 (in this case pythia8 8.311.*) to the

mg5amcnlo-feedstock/recipe/recipe.yaml

Lines 188 to 191 in b958fb2

	- if: build_platform != target_platform
	then:
	- cross-python_${{ target_platform }}
	- python

to get things to work, and the cross-compile will get things right?

---

Potentially useful build variables:

Some useful environment variables,

1. build_platform
2. target_platform
3. CONDA_BUILD_CROSS_COMPILATION - 1 if cross compiling
4. CMAKE_ARGS - arguments to pass to cmake
5. CC_FOR_BUILD - C compiler for build platform
6. CXX_FOR_BUILD - C++ compiler for build platform
7. HOST - a triplet for host passed to autoconf. eg: arm64-apple-darwin20.0.0
8. BUILD - a triplet for build passed to autoconf. eg: x86_64-conda-linux-gnu

c.f. https://conda-forge.org/blog/2020/10/29/macos-arm64/#how-to-add-a-osx-arm64-build-to-a-feedstock

[matthewfeickert]

Try without using compile.py

    # Manually compile MG5aMC_PY8_interface.cc instead of using compile.py
    - $CXX ./MG5aMC_PY8_interface.cc -o MG5aMC_PY8_interface $CXXFLAGS $(pythia8-config --cxxflags) $LDFLAGS $(pythia8-config --ldflags) -lHepMC
    - echo "UNSPECIFIED" > MG5AMC_VERSION_ON_INSTALL
    # - pythia8-config --version > PYTHIA8_VERSION_ON_INSTALL
    # FIXME: pythia8-config --version added in 8.312, so fall back
    # to get_pythia8_version.py
    - python ./get_pythia8_version.py $PREFIX > PYTHIA8_VERSION_ON_INSTALL

[workspace]
channels = ["conda-forge"]
name = "mg5amcnlo-feedstock-issue-7"
platforms = ["osx-arm64", "linux-64"]
version = "0.1.0"

[tasks.patch]
cmd = """
rm -rf MG5aMC_PY8_interface-5d82df1b77bd2b69ffeae5b6bfe100a62b31c30e && \
curl -sL https://github.com/mg5amcnlo/MG5aMC_PY8_interface/archive/5d82df1b77bd2b69ffeae5b6bfe100a62b31c30e.tar.gz | tar -xz && \
cd MG5aMC_PY8_interface-5d82df1b77bd2b69ffeae5b6bfe100a62b31c30e && \
$CXX ./MG5aMC_PY8_interface.cc -o MG5aMC_PY8_interface $CXXFLAGS $(pythia8-config --cxxflags) $LDFLAGS $(pythia8-config --ldflags) -lHepMC && \
echo "UNSPECIFIED" > MG5AMC_VERSION_ON_INSTALL && \
python ./get_pythia8_version.py $CONDA_PREFIX > PYTHIA8_VERSION_ON_INSTALL && \
cd .. && \
rm -rf $CONDA_PREFIX/MG5_aMC/HEPTools/MG5aMC_PY8_interface/* && \
cp MG5aMC_PY8_interface-5d82df1b77bd2b69ffeae5b6bfe100a62b31c30e/* $CONDA_PREFIX/MG5_aMC/HEPTools/MG5aMC_PY8_interface/
"""

[tasks.pythia-test]
cmd = """
rm -rf PYTHIA_MG5_RUN py.py && \
mg5_aMC ./tutorial.mg5
"""

[tasks.start]
depends-on = ["patch", "pythia-test"]

[dependencies]
mg5amcnlo = ">=3.5.7,<4"
curl = ">=8.14.1,<9"
tar = ">=1.35,<2"