diff --git a/pkgs/development/libraries/bulletml/default.nix b/pkgs/development/libraries/bulletml/default.nix
index 240cc057a821..b61ac1dcb09f 100644
--- a/pkgs/development/libraries/bulletml/default.nix
+++ b/pkgs/development/libraries/bulletml/default.nix
@@ -38,6 +38,7 @@ in stdenv.mkDerivation {
     "-C src"
   ];
   nativeBuildInputs = [ bison perl ];
+  hardeningDisable = [ "format" ];
 
   installPhase = ''
     install -D -m 644 src/bulletml.d "$out"/include/d/bulletml.d