{
  customConfig ? {},
  target ? builtins.currentSystem,
  haskellCompiler ? "ghc865"
}:
let
  lib = import ./nix/lib.nix;
  # Instantiate a package set using the generated file.
in
  lib.pkgs.haskell-nix.cabalProject {
    src = lib.pkgs.haskell-nix.haskellLib.cleanGit { src = ./.; };
    ghc = lib.pkgs.buildPackages.pkgs.haskell-nix.compiler.${haskellCompiler};
    pkg-def-extras = [
    #   # Additional packages ontop of all those listed in `cabal.project`
    ];
    modules = [
    #   # Specific package overrides would go here for example:
    #   packages.cbors.package.ghcOptions = "-Werror";
    #   packages.cbors.patches = [ ./one.patch ];
    #   packages.cbors.flags.optimize-gmp = false;
    #   # It may be better to set flags in `cabal.project` instead
    #   # (`plan-to-nix` will include them as defaults).
    ];
  }