in {
      ${name} = let
      in
        pkgs.stdenv.mkDerivation {
          inherit system name;
          src = ./tools;
          builder = ./build.sh;
          dontStrip = true;
          buildInputs = [
            pkgs.makeWrapper
            pkgs.openssl.dev
            sbcl
            pkgs.which
            pkgs.zsh
          ];
        };
    };

    in
      pkgs.stdenv.mkDerivation {
        inherit system name;
        src = ./tools;
        builder = ./build.sh;
        dontStrip = true;
        buildInputs = [
          pkgs.makeWrapper
          pkgs.openssl.dev
          sbcl
          pkgs.which
          pkgs.zsh
        ];
      };