cabal.nix

{ pkgs ? import <nixpkgs> {}
, compiler ? "ghc822"
}:

with pkgs;

let
  ghc = haskell.packages.${compiler}.ghcWithPackages (ps: with ps; [ cabal-install ]);
in

stdenv.mkDerivation {
    name = "cabal-env";
    buildInputs = [ ghc zlib ];
    shellHook = ''
      eval $(grep export ${ghc}/bin/ghc)
      export LD_LIBRARY_PATH="${zlib}/lib:$LD_LIBRARY_PATH";
    '';
}