diff --git a/pkgs/development/compilers/clean/default.nix b/pkgs/development/compilers/clean/default.nix
index 7f3e679e8476..dcb7350fbbb2 100644
--- a/pkgs/development/compilers/clean/default.nix
+++ b/pkgs/development/compilers/clean/default.nix
@@ -14,6 +14,9 @@ stdenv.mkDerivation rec {
     })
     else throw "Architecture not supported";
 
+  hardening_format = false;
+  hardening_pic = false;
+
   # clm uses timestamps of dcl, icl, abc and o files to decide what must be rebuild
   # and for chroot builds all of the library files will have equal timestamps.  This
   # makes clm try to rebuild the library modules (and fail due to absence of write permission