1 files changed, 1 insertions, 1 deletions
diff --git a/src/main/java/com/google/devtools/build/lib/collect/nestedset/NestedSetBuilder.java b/src/main/java/com/google/devtools/build/lib/collect/nestedset/NestedSetBuilder.java
index be932dd549..c3da6679bf 100644
--- a/src/main/java/com/google/devtools/build/lib/collect/nestedset/NestedSetBuilder.java
+++ b/src/main/java/com/google/devtools/build/lib/collect/nestedset/NestedSetBuilder.java
@@ -121,7 +121,7 @@ public final class NestedSetBuilder<E> {
     Preconditions.checkNotNull(subset);
     Preconditions.checkArgument(
         order.isCompatible(subset.getOrder()),
-        "Order mismatch: %s != %s", subset.getOrder(), order);
+        "Order mismatch: %s != %s", subset.getOrder().getSkylarkName(), order.getSkylarkName());
     if (!subset.isEmpty()) {
       transitiveSets.add(subset);
     }