{ nixpkgs ? import {}, compiler ? "default", doBenchmark ? false }: let inherit (nixpkgs) pkgs; f = { mkDerivation, base, bound, lib, llvm-codegen , recursion-schemes }: mkDerivation { pname = "haskell"; version = "0.1.0.0"; src = ./.; isLibrary = false; isExecutable = true; executableHaskellDepends = [ base bound llvm-codegen recursion-schemes ]; license = "unknown"; mainProgram = "haskell"; }; haskellPackages = if compiler == "default" then pkgs.callPackage ./pkgs {} else pkgs.haskell.packages.${compiler}; variant = if doBenchmark then pkgs.haskell.lib.doBenchmark else pkgs.lib.id; drv = variant (haskellPackages.callPackage f {}); in if pkgs.lib.inNixShell then drv.env else drv