let
  sources = import ./nix/sources.nix;
  haskellNix = import sources."haskell.nix" {};
  nixpkgsSrc = haskellNix.sources.nixpkgs-2003;
  nixpkgsArgs = haskellNix.nixpkgsArgs;
  pkgs = import nixpkgsSrc nixpkgsArgs ;
  project = pkgs.haskell-nix.stackProject {
    src = pkgs.nix-gitignore.gitignoreSource [] ./.;
    compiler-nix-name = "ghc883";
    haskellNix = haskellNix;
  };
in project.overrideAttrs (old: {
    # override something from the list at https://input-output-hk.github.io/haskell.nix/reference/library/#stackproject
})