diff --git a/pkgs/servers/sql/postgresql/ext/smlar.nix b/pkgs/servers/sql/postgresql/ext/smlar.nix
index 12fdd79cc8f42..4188c3b9c99a1 100644
--- a/pkgs/servers/sql/postgresql/ext/smlar.nix
+++ b/pkgs/servers/sql/postgresql/ext/smlar.nix
@@ -26,5 +26,7 @@ stdenv.mkDerivation rec {
     platforms = postgresql.meta.platforms;
     license = licenses.bsd2;
     maintainers = [ ];
+    # Broken on darwin and linux (JIT) with no upstream fix available.
+    broken = lib.versionAtLeast postgresql.version "16" && stdenv.cc.isClang;
   };
 }