esy install failing on Windows.

[differentprogramming]

• Operating System: Windows 10 Pro
• Revery Version: Trying to install
• OCaml version: trying to install
  I do have visual studio 2017 installed

After various false starts I got as far as typing
"esy install" in an admin prompt in the revery cloned directory and it got as far as:

.... fetching reperf@1.5.0esy: internal error, uncaught exception:
Unix.Unix_error(Unix.EACCES, "rename", "C:\local\revery\_esy\default\tmp\esy-ce1b63")
Raised at file "esy-lib/RunAsync.re", line 13, characters 2-51
Re-raised at file "esy-lib/RunAsync.re", line 13, characters 2-51
Re-raised at file "src/core/lwt.ml", line 2999, characters 20-29
Called from file "src/unix/lwt_main.ml", line 26, characters 8-18
Called from file "esy-lib/Cli.re", line 264, characters 9-28
Called from file "cmdliner_term.ml", line 25, characters 19-24
Called from file "cmdliner.ml", line 25, characters 27-34
Called from file "cmdliner.ml", line 116, characters 32-39

Before that I installed npm
found that "npm install -g windows-build-tools" failed when my antivirus reports "PowerShell tried to load a malicious resource detected as Heur.BZC.ZFV.Boxter.6008.E5DBFDF9 and was blocked. Your device is safe." - and changing its settings won't stop it from blocking.

But then I noticed that you had a an alternative way to install.

"choco install visualstudio2017buildtools visualstudio2017-workload-vctools -y"

I tried that and it installed visualstudio2017buildtools but balked at visualstudio2017-workload-vctools.
So I tried again from an admin prompt but it claimed that visualstudio2017-workload-vctools was already installed.
So I tried "choco upgrade -y visualstudio2017-workload-vctools --force"
then I went back to the normal prompt and tried. "esy install"
That failed with something I don't see in the scrollback about tar not being able to create a symlink.
So I tried it again in the admin prompt and here I am at
.... fetching reperf@1.5.0esy: internal error, uncaught exception:
Unix.Unix_error(Unix.EACCES, "rename", "C:\local\revery\_esy\default\tmp\esy-c99678")
Raised at file "esy-lib/RunAsync.re", line 13, characters 2-51
Re-raised at file "esy-lib/RunAsync.re", line 13, characters 2-51
Re-raised at file "src/core/lwt.ml", line 2999, characters 20-29
Called from file "src/unix/lwt_main.ml", line 26, characters 8-18
Called from file "esy-lib/Cli.re", line 264, characters 9-28
Called from file "cmdliner_term.ml", line 25, characters 19-24
Called from file "cmdliner.ml", line 25, characters 27-34
Called from file "cmdliner.ml", line 116, characters 32-39

[differentprogramming]

I tried installing an older version of reperf, same error
I tried leaving reperf out of the install - same error on the NEXT include
I tried uninsalling esy and installing it again - same error
I tried turning off the virus scanner so that I could use "npm install -g windows-build-tools"

• once again I got the same error.

[geocine]

Mine also failed to install on Windows 10, I was able to install the windows-build-tools

OS: Windows 10
Terminal : Git Bash

info install 0.6.8 (using package.json)
.... fetching @opam/ocaml-lsp-server@github:ocaml/ocaml-lsp:ocaml-lsp-server.opam#5df0ce2      4 [main] gettext (12792) C:\Program Files\git\usr\bin\gettext.exe: *** fatal error - cygheap base mismatch detected - 0x18032D408/0x180340408.
This problem is probably due to using incompatible versions of the cygwin DLL.
Search for cygwin1.dll using the Windows Start->Find/Search facility
and delete all but the most recent version.  The most recent version *should*
reside in x:\cygwin\bin, where 'x' is the drive on which you have
installed the cygwin distribution.  Rebooting is also suggested if you
are unable to find another cygwin DLL.
      3 [main] envsubst (9352) C:\Program Files\git\usr\bin\envsubst.exe: *** fatal error - cygheap base mismatch detected - 0x18032D408/0x180340408.
This problem is probably due to using incompatible versions of the cygwin DLL.
Search for cygwin1.dll using the Windows Start->Find/Search facility
and delete all but the most recent version.  The most recent version *should*
reside in x:\cygwin\bin, where 'x' is the drive on which you have
installed the cygwin distribution.  Rebooting is also suggested if you
are unable to find another cygwin DLL.
      3 [main] envsubst (11540) C:\Program Files\git\usr\bin\envsubst.exe: *** fatal error - cygheap base mismatch detected - 0x18032D408/0x180340408.
This problem is probably due to using incompatible versions of the cygwin DLL.
Search for cygwin1.dll using the Windows Start->Find/Search facility
and delete all but the most recent version.  The most recent version *should*
reside in x:\cygwin\bin, where 'x' is the drive on which you have
installed the cygwin distribution.  Rebooting is also suggested if you
are unable to find another cygwin DLL.
.... fetching @opam/tyxml@opam:4.4.0      3 [main] gettext (18524) C:\Program Files\git\usr\bin\gettext.exe: *** fatal error - cygheap base mismatch detected - 0x18032D408/0x180340408.
This problem is probably due to using incompatible versions of the cygwin DLL.
Search for cygwin1.dll using the Windows Start->Find/Search facility
and delete all but the most recent version.  The most recent version *should*
reside in x:\cygwin\bin, where 'x' is the drive on which you have
installed the cygwin distribution.  Rebooting is also suggested if you
are unable to find another cygwin DLL.
      2 [main] envsubst (13720) C:\Program Files\git\usr\bin\envsubst.exe: *** fatal error - cygheap base mismatch detected - 0x18032D408/0x180340408.
This problem is probably due to using incompatible versions of the cygwin DLL.
Search for cygwin1.dll using the Windows Start->Find/Search facility
and delete all but the most recent version.  The most recent version *should*
reside in x:\cygwin\bin, where 'x' is the drive on which you have
installed the cygwin distribution.  Rebooting is also suggested if you
are unable to find another cygwin DLL.
      3 [main] envsubst (3708) C:\Program Files\git\usr\bin\envsubst.exe: *** fatal error - cygheap base mismatch detected - 0x18032D408/0x180340408.
This problem is probably due to using incompatible versions of the cygwin DLL.
Search for cygwin1.dll using the Windows Start->Find/Search facility
and delete all but the most recent version.  The most recent version *should*
reside in x:\cygwin\bin, where 'x' is the drive on which you have
installed the cygwin distribution.  Rebooting is also suggested if you
are unable to find another cygwin DLL.
.... fetching @opam/stdio@opam:v0.14.0      2 [main] gettext (18376) C:\Program Files\git\usr\bin\gettext.exe: *** fatal error - cygheap base mismatch detected - 0x18032D408/0x180340408.
This problem is probably due to using incompatible versions of the cygwin DLL.
Search for cygwin1.dll using the Windows Start->Find/Search facility
and delete all but the most recent version.  The most recent version *should*
reside in x:\cygwin\bin, where 'x' is the drive on which you have
installed the cygwin distribution.  Rebooting is also suggested if you
are unable to find another cygwin DLL.
      4 [main] envsubst (2892) C:\Program Files\git\usr\bin\envsubst.exe: *** fatal error - cygheap base mismatch detected - 0x18032D408/0x180340408.
This problem is probably due to using incompatible versions of the cygwin DLL.
Search for cygwin1.dll using the Windows Start->Find/Search facility
and delete all but the most recent version.  The most recent version *should*
reside in x:\cygwin\bin, where 'x' is the drive on which you have
installed the cygwin distribution.  Rebooting is also suggested if you
are unable to find another cygwin DLL.
      2 [main] envsubst (21860) C:\Program Files\git\usr\bin\envsubst.exe: *** fatal error - cygheap base mismatch detected - 0x18032D408/0x180340408.
This problem is probably due to using incompatible versions of the cygwin DLL.
Search for cygwin1.dll using the Windows Start->Find/Search facility
and delete all but the most recent version.  The most recent version *should*
reside in x:\cygwin\bin, where 'x' is the drive on which you have
installed the cygwin distribution.  Rebooting is also suggested if you
are unable to find another cygwin DLL.
esy: internal error, uncaught exception:
     Unix.Unix_error(Unix.EACCES, "rename", "C:\\Aivan\\PE\\revery\\_esy\\default\\tmp\\esy-8514a0")
     Raised at file "esy-lib/RunAsync.re", line 13, characters 2-51
     Re-raised at file "esy-lib/RunAsync.re", line 13, characters 2-51
     Re-raised at file "src/core/lwt.ml", line 2999, characters 20-29
     Called from file "src/unix/lwt_main.ml", line 26, characters 8-18
     Called from file "esy-lib/Cli.re", line 264, characters 9-28
     Called from file "cmdliner_term.ml", line 25, characters 19-24
     Called from file "cmdliner.ml", line 25, characters 27-34
     Called from file "cmdliner.ml", line 116, characters 32-39
.... fetching @opam/uucp@opam:13.0.0

[water-sucks]

I've ran into this error before; I removed the _esy (in the project) and .esy (in your home folder) directories and it worked after that. Also make sure you're running esy as admin; for some reason it never fully finishes for normal users.