Using broken haskell packages as devShell dependencies

[newton-migosi]

I'm trying to use ThreadScope but pulling it directly from haskell packages doesn't work.

I tried adding it to my flake's haskellProjects.default using doJailBreak like so

{
          devShell = {
            tools = hp:
              {
                inherit (hp) implicit-hie;
                treefmt = config.treefmt.build.wrapper;
                threadscope = pkgs.haskell.lib.doJailbreak hp.threadscope;
              } // config.treefmt.build.programs;
            hlsCheck.enable = true;
          };
          autoWire = [ "packages" "apps" "checks" ];
}

but I still get the error about broken packages

error: Package ‘threadscope-0.2.14.1’ in /nix/store/a33m7cv6m6rnmw2psqffc51ylk8n5820-source/pkgs/development/haskell-modules/hackage-packages.nix:292364 is marked as broken, refusing to evaluate.

[srid]

You want to add it overrides instead. https://haskell.flake.page/dependency

{
  overrides = self: super: {
    threadscope = pkgs.haskell.lib.doJailbreak super.threadscope;
  };
}

(The devShell's "hp" will use the final package set after these overrides are applied)

---

In regards to the error is marked as broken, refusing to evaluate, what you want is pkgs.haskell.lib.unmarkBroken.

[newton-migosi]

When I run

--- a/flake.nix
+++ b/flake.nix
@@ -26,13 +26,15 @@
           {
             devShell = {
               tools = hp: {
-                inherit (hp) implicit-hie;
+                inherit (hp) implicit-hie threadscope;
                 treefmt = config.treefmt.build.wrapper;
               } // config.treefmt.build.programs;
               hlsCheck.enable = true;
               mkShellArgs = { };
             };
-
+            overrides = self: super: {
+              threadscope = pkgs.haskell.lib.doJailbreak super.threadscope;
+            };
             autoWire = [ "packages" "apps" "checks" ];
           };

I still get

error: Package ‘threadscope-0.2.14.1’ in /nix/store/a33m7cv6m6rnmw2psqffc51ylk8n5820-source/pkgs/development/haskell-modules/hackage-packages.nix:292364 is marked as broken, refusing to evaluate.

[srid]

You want unmarkBroken:

{
  devShell.tools = hp: { inherit (hp) threadscope; };
  overrides = self: super: {
    threadscope = pkgs.haskell.lib.unmarkBroken super.threadscope;
  };
}

[newton-migosi]

Unmarking threadscope as broken then gives another error about threadscope's missing dependencies, specifically ghc-events

error: builder for '/nix/store/4nph6xlajxnnapg962f4add1dzc7qazh-threadscope-0.2.14.1.drv' failed with exit code 1;
       last 10 log lines:
       > [1 of 1] Compiling Main             ( Setup.hs, /build/tmp.3ttlw32ghn/Main.o )
       > Linking Setup ...
       > configuring
       > configureFlags: --verbose --prefix=/nix/store/0ddyz6hjhwd7nblswqj78z6bry0qgm75-threadscope-0.2.14.1 --libdir=$prefix/lib/$compiler --libsubdir=$abi/$libname --datadir=/nix/store/h1viiz69w3ilwa5r38hbvhvhiv7si8jx-threadscope-0.2.14.1-data/share/ghc-9.2.7 --docdir=/nix/store/mhjp68w6yrsx929mc4rzlx5mwirhibn4-threadscope-0.2.14.1-doc/share/doc/threadscope-0.2.14.1 --with-gcc=gcc --package-db=/build/tmp.3ttlw32ghn/package.conf.d --ghc-options=-j4 +RTS -A64M -RTS --disable-split-objs --enable-library-profiling --profiling-detail=exported-functions --disable-profiling --enable-shared --disable-coverage --enable-static --disable-executable-dynamic --enable-tests --disable-benchmarks --enable-library-vanilla --disable-library-for-ghci --ghc-option=-split-sections --extra-lib-dirs=/nix/store/4g9phbpakh51bbw2n391vipz9r5z56kw-ncurses-6.4/lib --extra-lib-dirs=/nix/store/mnq0hqsqivdbaqzmzc287l0z9zw8dp15-libffi-3.4.4/lib --extra-lib-dirs=/nix/store/0ssnwyy41aynhav7jr4dz1y01lfzi86f-gmp-with-cxx-6.2.1/lib
       > Using Parsec parser
       > Configuring threadscope-0.2.14.1...
       >
       > Setup: Encountered missing or private dependencies:
       > ghc-events >=0.13 && <0.18
       >
       For full logs, run 'nix log /nix/store/4nph6xlajxnnapg962f4add1dzc7qazh-threadscope-0.2.14.1.drv'.
error: 1 dependencies of derivation '/nix/store/valgd3vgvsvyczxz28ipxq3x7fj8jikr-nix-shell-env.drv' failed to build

[srid]

@newton-migosi You have to keep overriding things until they build. Come to https://app.element.io/#/room/#haskell:nixos.org and they'll help. As a next step, try:

{
  devShell.tools = hp: { inherit (hp) threadscope; };
  overrides = self: super: with pkgs.haskell.lib; {
    threadscope = unmarkBroken (doJailbreak super.threadscope);
  };
}

[newton-migosi]

using both unmarkBroken and doJailbreak seems to work.. threadscope was added to the nix-shell`

$ which threadscope
/nix/store/yqz2gi5p32frs5xpfjrg03k9h5qc3x6m-threadscope-0.2.14.1/bin/threadscope

$ threadscope -v
ThreadScope version 0.2.14.1

[newton-migosi]

Using unmarkBroken removes the error

--- a/flake.nix
+++ b/flake.nix
@@ -9,6 +9,10 @@
     treefmt-nix.url = "github:numtide/treefmt-nix";
     treefmt-nix.inputs.nixpkgs.follows = "nixpkgs";
     flake-root.url = "github:srid/flake-root";
+    threadscope = {
+      url = "github:haskell/ThreadScope";
+      flake = false;
+    };
   };
   outputs = inputs@{ self, nixpkgs, flake-parts, ... }:
     flake-parts.lib.mkFlake { inherit inputs; } {
@@ -22,17 +26,23 @@
 
       perSystem = { self', system, lib, config, inputs', pkgs, ... }: {
 
-        haskellProjects.default = {
-          devShell = {
-            tools = hp: {
-              inherit (hp) implicit-hie;
-              treefmt = config.treefmt.build.wrapper;
-            } // config.treefmt.build.programs;
-            hlsCheck.enable = true;
-            mkShellArgs = { };
+        haskellProjects.default =
+          {
+            devShell = {
+              tools = hp: {
+                inherit (hp) implicit-hie;
+                treefmt = config.treefmt.build.wrapper;
+              } // config.treefmt.build.programs;
+              hlsCheck.enable = true;
+              mkShellArgs = { };
+            };
+
+            overrides = self: super: {
+              threadscope = pkgs.haskell.lib.unmarkBroken (self.callCabal2nix "threadscope" inputs.threadscope { });
+            };
+
+            autoWire = [ "packages" "apps" "checks" ];
           };
-          autoWire = [ "packages" "apps" "checks" ];
-        };
 
         treefmt.config = {
           inherit (config.flake-root) projectRootFile;