{ crossenv }: let version = "7.3.0"; name = "xextproto-${version}"; src = crossenv.nixpkgs.fetchurl { url = "https://xorg.freedesktop.org/releases/individual/proto/xextproto-${version}.tar.bz2"; sha256 = "1c2vma9gqgc2v06rfxdiqgwhxmzk2cbmknwf1ng3m76vr0xb5x7k"; }; lib = crossenv.native.make_derivation rec { inherit version name src; builder = ./builder.sh; }; license = crossenv.native.make_derivation { name = "${name}-license"; inherit src; builder = ./license_builder.sh; }; license_set = { "${name}" = license; }; in lib // { inherit license_set; }