diff --git a/pkgs/development/tools/parsing/flex/flex-2.5.35.nix b/pkgs/development/tools/parsing/flex/flex-2.5.35.nix
index c200e4e7d2f7..ae68bb65d7b2 100644
--- a/pkgs/development/tools/parsing/flex/flex-2.5.35.nix
+++ b/pkgs/development/tools/parsing/flex/flex-2.5.35.nix
@@ -11,7 +11,7 @@ stdenv.mkDerivation {
     sha256 = "0ysff249mwhq0053bw3hxh58djc0gy7vjan2z1krrf9n5d5vvv0b";
   };
   buildInputs = [yacc];
-  propagatedBuildInputs = [m4];
+  propagatedBuildNativeInputs = [m4];
 
   meta = {
     description = "A fast lexical analyser generator";