diff --git a/src/cljs/snapshot/lumo/repl.cljs b/src/cljs/snapshot/lumo/repl.cljs
index f8ce0269..d012e64b 100644
--- a/src/cljs/snapshot/lumo/repl.cljs
+++ b/src/cljs/snapshot/lumo/repl.cljs
@@ -696,7 +696,10 @@
          #_(when-let [data (and print-ex-data? (ex-data error))]
              (print-value data {::as-code? false}))
          (when stacktrace?
-           (let [opts {:output-dir "file://(/goog/..)?"}
+           ;; .lumo-cache seems more appropriate, see examples in core:
+           ;; https://github.com/clojure/clojurescript/blob/20a6e1fcd8724ad65a3776112dcc7bfd5124a094/src/main/cljs/cljs/stacktrace.cljc#L206
+           ;; https://github.com/clojure/clojurescript/blob/20a6e1fcd8724ad65a3776112dcc7bfd5124a094/src/main/cljs/cljs/stacktrace.cljc#L537-L551
+           (let [opts {:output-dir ".lumo_cache"}
                  canonical-stacktrace (into []
                                             stacktrace-patch-xf
                                             (st/parse-stacktrace