diff --git a/lib/LintConfig.hs b/lib/LintConfig.hs
index b6e60808b06b30fc02a172d12fdbc1b9cf8a4b6c..1e9e5381a64eff4912b7d204bddeb151ac4c1ade 100644
--- a/lib/LintConfig.hs
+++ b/lib/LintConfig.hs
@@ -137,7 +137,7 @@ patchConfig config p = config'
         assemblysubst = \case
           DomainSubstitution subst scope ->
             DomainSubstitution (subst <> M.fromList generated) scope
-            where generated = (\slug -> (slug, "/@/"<>slug)) <$> configAssemblies config'
+            where generated = (\slug -> (slug, "/@/rc3_21/"<>slug)) <$> configAssemblies config'
           other -> other
 
 instance (FromJSON (LintConfig a)) => Argument (LintConfig a) where