I’ve got a small haskell project and I am building it using a flake using cabal2nix based on a package.yaml file.

nix build works fine, but I have trouble with my nix develop shell. The shell is built using shellFor from haskellPackages.

Is it possible to construct a shell that contains all dependencies to build the package, but not the package itself? I tried returning the buildInputs from the packages function, but that didn’t seem to have any effect. When I return my package from that function, all dependencies are available, however the package is also built - is that how it is supposed to be?

#nix #haskell

  • jakalx@programming.devOPEnglish
    1·
    1 year ago

    Thanks for clearing that up for me!

    I have this snippet in my flake now:

    packages = _: [ self.packages.${system}.default ];

    And it seems to do exactly what I wanted.