# This should be moved to default.nix eventually (?) {stdenv, fetchurl, yacc, m4}: assert yacc != null && m4 != null; stdenv.mkDerivation { name = "flex-2.5.34"; src = fetchurl { url = mirror://sourceforge/flex/flex-2.5.34.tar.bz2; sha256 = "1c8e64f32508841b0441ddfb139c4cfd25fee3728cadb63f5f351c6eb9b224a6"; }; buildInputs = [yacc]; propagatedBuildInputs = [m4]; meta = { description = "A fast lexical analyser generator"; }; NO_PARALLEL_BUILD_installPhase = 1; }