rec {

  overlays = [

    (final: prev: {

      # make buildGoModule default to static compilation
      buildGoModule = args: prev.buildGoModule ({
        doCheck = false;
        CGO_ENABLED=0;
        tags = [ "netgo" "timetzdata" ];
        ldflags = [ "-w" "-extldflags=-static" ];
      } // args);

    })

    (final: prev: { rebase = prev.callPackage ./rebase.nix {}; })
    (final: prev: { yq-go = prev.callPackage ./yq-go.nix {}; })
    (final: prev: { nebula = prev.callPackage ./nebula.nix {}; })
  ];

  stableSrc = fetchTarball {
    name = "nixpkgs-22-05";
    url = "https://github.com/NixOS/nixpkgs/archive/2aec372cdcd4d73b94863611fea70e0884270fdc.tar.gz";
    sha256 = "1pbfhlh4v8l70p44gspsci3i6w0wk70vaisiawg3jhka2nxb8367";
  };

  stable = import stableSrc { inherit overlays; };
}