in a devshell i get the ghc i want with:

      (ghc.overrideAttrs (old: {
        patches = old.patches or [ ] ++ [ ./dont-free-stable-ptr.patch ];
      })).override
      { useLLVM = true; }

nope, i still dont know how to do it, i tried

          haskellPackages = pkgs.haskellPackages.override {
            ghc = modifyGhc pkgs.haskellPackages.ghc;
          };

modifyGhc applies the modifications i sent above

In reply to @magic_rb:matrix.redalder.org
how can i create a haskellPackages set with a patched GHC?

In reply to @maralorn:maralorn.de
You can browse through nixpkgs around haskell-modules/make-package-set.nix and look at the function arguments you can override.

I'm a complete newbie to nix, so please excuse my lack of knowledge:

I'm trying to build the broken package haskore, which is auto-generated by hackage2nix. When building with NIXPKGS\_ALLOW\_BROKEN=1, the build fails with a dependency error (which looks like it comes from cabal, even tough I'm building with nix?):

CallStack (from HasCallStack):
  withMetadata, called at libraries/Cabal/Cabal/src/Distribution/Simple/Utils.hs:368:14 in Cabal-3.10.3.0-cb0e:Distribution.Simple.Utils
Error: Setup: Encountered missing or private dependencies:
bytestring >=0.9 && <0.11, transformers >=0.0.1 && <0.6

Now, further 'investigation' showed, that the packages bytestringand transformersare not in nixpkgs, because the modules they provide are automatically installed when installing ghc.

When trying to tell nix to just not care about those dependencies, I looked into the auto-generated hackage-packages.nix and, indeed, the dependencies for bytestring and transformers are in the buildInputs. But the confusing part is, that many packages have those dependencies, but build perfectly fine, even tough their dependencies, as it seems to me, can't be fulfilled.

Even tough I didn't test it (because I didn't understand how), I believe the error persists in the haskell-updates branch, since the package definition of haskore didn't change.

Can someone explain this to me? Does testHaskellDepends have anything to do with the problem? And do I, with just enough understanding of nix to successfully build my NixOS System, have a chance to fix this issue locally or upstream in about 1-2 days of work? Might someone even volunteer to help me with this?

I'm a complete newbie to nix, so please excuse my lack of knowledge:

I'm trying to build the broken package haskore, which is auto-generated by hackage2nix. When building with NIXPKGS\_ALLOW\_BROKEN=1, the build fails with a dependency error (which looks like it comes from cabal, even tough I'm building with nix?):

CallStack (from HasCallStack):
  withMetadata, called at libraries/Cabal/Cabal/src/Distribution/Simple/Utils.hs:368:14 in Cabal-3.10.3.0-cb0e:Distribution.Simple.Utils
Error: Setup: Encountered missing or private dependencies:
bytestring >=0.9 && <0.11, transformers >=0.0.1 && <0.6

Now, further 'investigation' showed, that the packages bytestring and transformers are not in nixpkgs, because the modules they provide are automatically installed when installing ghc.

When trying to tell nix to just not care about those dependencies, I looked into the auto-generated hackage-packages.nix and, indeed, the dependencies for bytestring and transformers are in the buildInputs. But the confusing part is, that many packages have those dependencies, but build perfectly fine, even tough their dependencies, as it seems to me, can't be fulfilled.

Even tough I didn't test it (because I didn't understand how), I believe the error persists in the haskell-updates branch, since the package definition of haskore didn't change.

Can someone explain this to me? Does testHaskellDepends have anything to do with the problem? And do I, with just enough understanding of nix to successfully build my NixOS System, have a chance to fix this issue locally or upstream in about 1-2 days of work? Might someone even volunteer to help me with this?

In reply to @le:4d2.org

I'm a complete newbie to nix, so please excuse my lack of knowledge:

I'm trying to build the broken package haskore, which is auto-generated by hackage2nix. When building with NIXPKGS\_ALLOW\_BROKEN=1, the build fails with a dependency error (which looks like it comes from cabal, even tough I'm building with nix?):

CallStack (from HasCallStack):
  withMetadata, called at libraries/Cabal/Cabal/src/Distribution/Simple/Utils.hs:368:14 in Cabal-3.10.3.0-cb0e:Distribution.Simple.Utils
Error: Setup: Encountered missing or private dependencies:
bytestring >=0.9 && <0.11, transformers >=0.0.1 && <0.6

Now, further 'investigation' showed, that the packages bytestringand transformersare not in nixpkgs, because the modules they provide are automatically installed when installing ghc.

When trying to tell nix to just not care about those dependencies, I looked into the auto-generated hackage-packages.nix and, indeed, the dependencies for bytestring and transformers are in the buildInputs. But the confusing part is, that many packages have those dependencies, but build perfectly fine, even tough their dependencies, as it seems to me, can't be fulfilled.

Even tough I didn't test it (because I didn't understand how), I believe the error persists in the haskell-updates branch, since the package definition of haskore didn't change.

Can someone explain this to me? Does testHaskellDepends have anything to do with the problem? And do I, with just enough understanding of nix to successfully build my NixOS System, have a chance to fix this issue locally or upstream in about 1-2 days of work? Might someone even volunteer to help me with this?

In reply to @le:4d2.org

I'm a complete newbie to nix, so please excuse my lack of knowledge:

I'm trying to build the broken package haskore, which is auto-generated by hackage2nix. When building with NIXPKGS\_ALLOW\_BROKEN=1, the build fails with a dependency error (which looks like it comes from cabal, even tough I'm building with nix?):

CallStack (from HasCallStack):
  withMetadata, called at libraries/Cabal/Cabal/src/Distribution/Simple/Utils.hs:368:14 in Cabal-3.10.3.0-cb0e:Distribution.Simple.Utils
Error: Setup: Encountered missing or private dependencies:
bytestring >=0.9 && <0.11, transformers >=0.0.1 && <0.6

Now, further 'investigation' showed, that the packages bytestring and transformers are not in nixpkgs, because the modules they provide are automatically installed when installing ghc.

When trying to tell nix to just not care about those dependencies, I looked into the auto-generated hackage-packages.nix and, indeed, the dependencies for bytestring and transformers are in the buildInputs. But the confusing part is, that many packages have those dependencies, but build perfectly fine, even tough their dependencies, as it seems to me, can't be fulfilled.

Even tough I didn't test it (because I didn't understand how), I believe the error persists in the haskell-updates branch, since the package definition of haskore didn't change.

Can someone explain this to me? Does testHaskellDepends have anything to do with the problem? And do I, with just enough understanding of nix to successfully build my NixOS System, have a chance to fix this issue locally or upstream in about 1-2 days of work? Might someone even volunteer to help me with this?

Success! I had to also disable the Tests since they also do not work (and seem pretty unfixable to me), but with this abomination of a nix-shell command, it builds!

nix-shell -p 'haskellPackages.ghcWithPackages (p: with haskell.lib; [(unmarkBroken (dontCheck (doJailbreak p.haskore)))])'

Is this a solution worth pushing to the repo, or is the usage of doJailbreak and dontCheck too ugly?

In reply to @le:4d2.org

Success! I had to also disable the Tests since they also do not work (and seem pretty unfixable to me), but with this abomination of a nix-shell command, it builds!

nix-shell -p 'haskellPackages.ghcWithPackages (p: with haskell.lib; [(unmarkBroken (dontCheck (doJailbreak p.haskore)))])'

Is this a solution worth pushing to the repo, or is the usage of doJailbreak and dontCheck too ugly?