Nix overlay for shell

[piq9117]

overlays/tie.nix

self: super: {
  haskellPackages = super.haskellPackages.override {
    overrides = hself: hsuper: {
      openapi3 = hsuper.callCabal2nix "openapi3" (builtins.fetchGit {
        url = "https://github.com/alexbiehl/openapi3.git";
        rev = "4793b3c09f8c146161f7e78f8c0924bc9b0ec395";
        ref = "alex/aeson-2-support-for-extensions";
      }){};
      tie = hself.callCabal2nix "tie" (builtins.fetchGit {
        url = "[email protected]:scarf-sh/tie.git";
        ref = "main";
      }){};
    };
  };
}

shell.nix

{ pkgs ? import <nixpkgs> {overlays = (import ./overlays/tie.nix); }}:
pkgs.mkShell {}

This is mostly for my reference.

[alexbiehl]

Very sweet! Do you think it would make sense to make it part of ties default.nix or be should we maybe pin this issue for future readers at the very least?

[piq9117]

not sure. i think everyone has moved on to flakes. 😅 I think this is good enough. If someone searches for "nix" in the issues, this will show up anyway.