{ pkgs, ... }: let

  signageForPkgs = pkgs: with { inherit (pkgs) love fetchFromGitHub stdenv curl; }; let
    # Build LÖVE2D 12, currently still in development. This gives us https
    # support.
    love12 = (love.overrideAttrs (oa: {
      version = "12.0-dev";
      src = fetchFromGitHub {
        owner = "love2d";
        repo = "love";
        rev = "d586d1847446f5212d5f7e9efb94e50fcfba7d77";
        sha256 = "sha256-gTpVtyqXV6/GsezuCpooaY+x5tPfOF9p1b83v4kKR4E=";
      };
      makeFlags = [
        "CPPFLAGS=-DHTTPS_BACKEND_CURL"
      ];
      buildInputs = oa.buildInputs ++ [ curl ];
      NIX_LDFLAGS = "-lcurl";
      enableParallelBuilding = true;
    }));

    signage = stdenv.mkDerivation {
      name = "signage";
      src = ./.;

      installPhase = ''
        mkdir -p $out/share/signage
        cp -rv $src/* $out/share/signage/

        mkdir -p $out/bin/
        cat <<EOF >$out/bin/signage
        #!/usr/bin/env bash
        ${love12}/bin/love $out/share/signage
        EOF
        chmod +x $out/bin/signage
      '';

      passthru.runtime = love12;
    };
  in signage;

in {
  prod = signageForPkgs pkgs;
  local = signageForPkgs (import <nixpkgs> {});
}