# This should be moved to default.nix eventually (?) {stdenv, fetchurl, yacc, m4}: assert yacc != null && m4 != null; stdenv.mkDerivation { name = "flex-2.5.35"; src = fetchurl { url = mirror://sourceforge/flex/flex-2.5.35.tar.bz2; sha256 = "0ysff249mwhq0053bw3hxh58djc0gy7vjan2z1krrf9n5d5vvv0b"; }; buildInputs = [yacc]; propagatedBuildNativeInputs = [m4]; crossAttrs = { preConfigure = '' export ac_cv_func_malloc_0_nonnull=yes export ac_cv_func_realloc_0_nonnull=yes ''; }; meta = { description = "A fast lexical analyser generator"; }; }