Haskell toolchain on Nix

Troubleshooting

Failed with zlib-xxx during stack build or cabal v2-build

This happened because stack/cabal failed to detect system libraries.

Solution: For stack,

# stack.yaml
# or globally ~/.stack/config.yaml
nix:
  enable: true # This may have already been enabled on NixOS
  packages: [zlib.dev, zlib.out]

For cabal, add pkgs.zlib into devshell and set LD_LIBRARY_PATH for cabal linker to find libraries.

  mkShell rec {
    buildInputs = [
      ...
      zlib
    ];

    # Ensure that libz.so and other libraries are available to TH
    # splices, cabal repl, etc.
    LD_LIBRARY_PATH = lib.makeLibraryPath buildInputs;
  }

Ref:

stackIssue2975Link

nixShellCabalReplIssue