1 files changed, 1 insertions, 0 deletions
diff --git a/src/main/java/com/google/devtools/build/lib/skyframe/PackageValue.java b/src/main/java/com/google/devtools/build/lib/skyframe/PackageValue.java
index 840a4c8ec2..d637a7fecf 100644
--- a/src/main/java/com/google/devtools/build/lib/skyframe/PackageValue.java
+++ b/src/main/java/com/google/devtools/build/lib/skyframe/PackageValue.java
@@ -54,6 +54,7 @@ public class PackageValue implements NotComparableSkyValue {
   }
 
   public static SkyKey key(PackageIdentifier pkgIdentifier) {
+    Preconditions.checkArgument(!pkgIdentifier.getRepository().isDefault());
     return SkyKey.create(SkyFunctions.PACKAGE, pkgIdentifier);
   }