diff --git a/build-constraints.yaml b/build-constraints.yaml
index b0f97ae5..f13b9283 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -2308,8 +2308,8 @@ packages:
     "Suhail Shergill <suhailshergill@gmail.com> @suhailshergill":
         - extensible-effects
 
-    # "Justus Adam <dev@justus.science> @JustusAdam":
-        - mustache
+    "Justus Adam <dev@justus.science> @JustusAdam":
+        - marvin
 
     "Cindy Wang <cindylinz@gmail.com> @CindyLinz":
         - NoTrace