Look for assets in vendor/assets/*/.
diff --git a/config.lisp b/config.lisp
index 3e3f2ff..8a2f18c 100644
--- a/config.lisp
+++ b/config.lisp
@@ -26,6 +26,7 @@
'("lib/*/triangle/assets/*/"
"lib/triangle/*/triangle/assets/*/"
"app/assets/*/"
+ "vendor/assets/*/"
"assets/*/"))
(defparameter *assets-dirs*