diff --git a/pkgs/tools/networking/mailutils/default.nix b/pkgs/tools/networking/mailutils/default.nix
index cbca408f084..53e17e6cecd 100644
--- a/pkgs/tools/networking/mailutils/default.nix
+++ b/pkgs/tools/networking/mailutils/default.nix
@@ -11,6 +11,8 @@ stdenv.mkDerivation rec {
     sha256 = "0szbqa12zqzldqyw97lxqax3ja2adis83i7brdfsxmrfw68iaf65";
   };
 
+  hardening_format = false;
+
   patches = [ ./path-to-cat.patch ./no-gets.patch ];
 
   configureFlags = "--with-path-sendmail=${sendmailPath}";