stackprojectcross.nix

{
  stackProjectCross = {crossPkgs, pkgs, ...}@args: with crossPkgs.haskell-nix;
    let stack = importAndFilterProject (pkgs.haskell-nix.callStackToNix args);
        pkg-set = mkStackPkgSet
      { stack-pkgs = stack.pkgs;
        pkg-def-extras = (args.pkg-def-extras or []);
        modules = (args.modules or [])
                  ++ pkgs.lib.optional (args ? ghc) { ghc.package = args.ghc; }
                  ++ pkgs.lib.optional (args ? cache) (mkCacheModule args.cache);
      };
        p = { inherit (pkg-set.config) hsPkgs; stack-nix = stack.nix; };
    in p.hsPkgs // {
      inherit (p) stack-nix;
      shells.ghc = p.hsPkgs.shellFor {};
    };
}