haskell-modules/generic-builder.nix: add gcc to generated shell

{ lib, stdenv, buildPackages, buildHaskellPackages, ghc

, jailbreak-cabal, hscolour, cpphs, runCommand

, jailbreak-cabal, hscolour, cpphs, runCommandCC

, ghcWithHoogle, ghcWithPackages

, nodejs

}:

          lib.optionals (!isCross) setupHaskellDepends);

        ghcCommandCaps = lib.toUpper ghcCommand';

      in runCommand name {

      in runCommandCC name {

        inherit shellHook;

        depsBuildBuild = lib.optional isCross ghcEnvForBuild;