{ lib, stdenv, fetchurl, autoreconfHook, flex, bison, texinfo, help2man, m4 }: stdenv.mkDerivation { name = "flex-2.5.35"; src = fetchurl { url = "https://github.com/westes/flex/archive/flex-2-5-35.tar.gz"; sha256 = "0wh06nix8bd4w1aq4k2fbbkdq5i30a9lxz3xczf3ff28yy0kfwzm"; }; postPatch = '' patchShebangs tests ''; nativeBuildInputs = [ flex bison texinfo help2man autoreconfHook ]; propagatedBuildInputs = [ m4 ]; preConfigure = lib.optionals (stdenv.hostPlatform != stdenv.buildPlatform) [ "ac_cv_func_malloc_0_nonnull=yes" "ac_cv_func_realloc_0_nonnull=yes" ]; doCheck = false; # fails 2 out of 46 tests meta = with lib; { branch = "2.5.35"; homepage = "http://flex.sourceforge.net/"; description = "A fast lexical analyser generator"; license = licenses.bsd2; platforms = platforms.unix; }; }