fix: make sure to cover pg_net too

Author: samrose

flake.nix

@@ -164,7 +164,7 @@
         ];
 
         # Add pg_net only if NOT on macOS aarch64
-        pgNetExtension = if (system == "aarch64-darwin") 
+        pgNetExtension = if (system == "aarch64-darwin" || system == "x86_64-darwin")
           then []
           else [ ./nix/ext/pg_net.nix ];