foo.nix

{ pkgs ? import ./nixpkgs.nix
, compiler ? "ghc802" 
, imageName ? "foo:dev"
}:

let 

  inherit (pkgs.haskell.lib) buildStrictly justStaticExecutables overrideCabal;
  inherit (pkgs.lib.strings) splitString;
  inherit (builtins) elemAt;

  cabal2nix = pkgs.haskell.packages."${compiler}".callCabal2nix;

in rec {

  foo = buildStrictly (justStaticExecutables (cabal2nix "foo" ./. {}));

  shell = overrideCabal getty-images-token-service (old: {
    libraryHaskellDepends = old.libraryHaskellDepends ++ (with pkgs; [ haskellPackages.stylish-haskell ]);
  }).env;

  #shell = getty-images-token-service.env;