{stdenv, fetchurl, flex}: let s = # Generated upstream information rec { baseName="gnuchess"; version="6.1.1"; name="${baseName}-${version}"; hash="1jckpg1qi1vjr3pqs0dnip3rmn0mgklx63xflrpqiv3cx2qlz8kn"; url="http://ftp.gnu.org/gnu/chess/gnuchess-6.1.1.tar.gz"; sha256="1jckpg1qi1vjr3pqs0dnip3rmn0mgklx63xflrpqiv3cx2qlz8kn"; }; buildInputs = [ flex ]; in stdenv.mkDerivation rec { inherit (s) name version; src = fetchurl { inherit (s) url sha256; }; inherit buildInputs; meta = { inherit (s) version; description = "GNU Chess engine"; maintainers = [stdenv.lib.maintainers.raskin]; platforms = stdenv.lib.platforms.linux; license = stdenv.lib.licenses.gpl3Plus; }; }