diff --git a/core/core-packages.el b/core/core-packages.el
index a3244587d..7251adfe3 100644
--- a/core/core-packages.el
+++ b/core/core-packages.el
@@ -105,6 +105,12 @@ uses a straight or package.el command directly).")
   (append (apply orig-fn args) ; lockfiles still take priority
           (doom-package-pinned-list)))
 
+(with-eval-after-load 'straight
+  ;; HACK Fix #3406: by installing some built-in packages, we get version
+  ;;      conflicts, so blacklist them. Revert once raxod502/straight.el#537 is
+  ;;      resolved.
+  (add-to-list 'straight-recipes-gnu-elpa-ignored-packages 'seq))
+
 
 ;;
 ;;; Bootstrappers