{ lib, stdenv, fetchurl }: stdenv.mkDerivation rec { version = "6.31"; pname = "clips"; src = fetchurl { url = "mirror://sourceforge/clipsrules/CLIPS/${version}/clips_core_source_${ builtins.replaceStrings [ "." ] [ "" ] version }.tar.gz"; sha256 = "165k0z7dsv04q432sanmw0jxmxwf56cnhsdfw5ffjqxd3lzkjnv6"; }; makeFlags = [ "-C" "core" ]; installPhase = '' runHook preInstall install -D -t $out/bin core/clips runHook postInstall ''; meta = with lib; { description = "A Tool for Building Expert Systems"; homepage = "http://www.clipsrules.net/"; longDescription = '' Developed at NASA's Johnson Space Center from 1985 to 1996, CLIPS is a rule-based programming language useful for creating expert systems and other programs where a heuristic solution is easier to implement and maintain than an algorithmic solution. ''; license = licenses.publicDomain; maintainers = [ maintainers.league ]; platforms = platforms.linux; }; }