1 files changed, 10 insertions, 0 deletions
diff --git a/tvix/castore/src/directoryservice/combinators.rs b/tvix/castore/src/directoryservice/combinators.rs
index 2364a313d5f4..74d02f1ad2b9 100644
--- a/tvix/castore/src/directoryservice/combinators.rs
+++ b/tvix/castore/src/directoryservice/combinators.rs
@@ -151,6 +151,16 @@ pub struct CacheConfig {
     far: String,
 }
 
+impl TryFrom<url::Url> for CacheConfig {
+    type Error = Box<dyn std::error::Error + Send + Sync>;
+    fn try_from(_url: url::Url) -> Result<Self, Self::Error> {
+        Err(Error::StorageError(
+            "Instantiating a CombinedDirectoryService from a url is not supported".into(),
+        )
+        .into())
+    }
+}
+
 #[async_trait]
 impl ServiceBuilder for CacheConfig {
     type Output = dyn DirectoryService;