self: super: {
  pinch = if builtins.hasAttr "pinch" super then
    super.pinch
  else
    super.writeShellScriptBin "pinch" ''
      exec ${self.python3}/bin/python3 ${
        super.fetchgit {
          url = "https://scottworley.com/pinch.git";
          rev = "1.1";
          sha256 = "0ilbhvr0d83kfwkm7ak64gik44gi2axfnp9rzsa7g5cwz9qaxdbv";
        }
      }/pinch.py "$@"
    '';
}