diff --git a/pkgs/tools/graphics/astc-encoder/default.nix b/pkgs/tools/graphics/astc-encoder/default.nix
index 8e7f71e68a4..e2af1494874 100644
--- a/pkgs/tools/graphics/astc-encoder/default.nix
+++ b/pkgs/tools/graphics/astc-encoder/default.nix
@@ -73,5 +73,6 @@ gccStdenv.mkDerivation rec {
     platforms = platforms.unix;
     license = licenses.asl20;
     maintainers = with maintainers; [ dasisdormax ];
+    broken = !gccStdenv.is64bit;
   };
 }