diff --git a/pkgs/by-name/fu/furnace/package.nix b/pkgs/by-name/fu/furnace/package.nix
index 10d55b9871ae..b121a091de5d 100644
--- a/pkgs/by-name/fu/furnace/package.nix
+++ b/pkgs/by-name/fu/furnace/package.nix
@@ -28,14 +28,14 @@
 
 stdenv.mkDerivation (finalAttrs: {
   pname = "furnace";
-  version = "0.6.3";
+  version = "0.6.5";
 
   src = fetchFromGitHub {
     owner = "tildearrow";
     repo = "furnace";
     rev = "v${finalAttrs.version}";
     fetchSubmodules = true;
-    hash = "sha256-z0WvJvkry/9T4Fgp2fX83CxPpDBoOPNVtyX2OUk26FI=";
+    hash = "sha256-szDRaujlstRHbvuddi8HdYb00uHNyvAz+/Ex1mKfMXY=";
   };
 
   postPatch = lib.optionalString stdenv.hostPlatform.isLinux ''
@@ -88,7 +88,8 @@ stdenv.mkDerivation (finalAttrs: {
     (lib.cmakeBool "USE_GLES" (withGL && preferGLES))
     (lib.cmakeBool "WITH_RENDER_METAL" false) # fails to build
     (lib.cmakeBool "WITH_RENDER_OPENGL1" (withGL && !preferGLES))
-    (lib.cmakeBool "WARNINGS_ARE_ERRORS" true)
+    # New l10n code still has some fortify bugs
+    (lib.cmakeBool "WARNINGS_ARE_ERRORS" false)
     (lib.cmakeBool "FORCE_APPLE_BIN" true)
   ];