diff --git a/tycho-core/src/main/java/org/eclipse/tycho/p2tools/TychoMirrorApplication.java b/tycho-core/src/main/java/org/eclipse/tycho/p2tools/TychoMirrorApplication.java
index dd0780f352..e31a9f60a8 100644
--- a/tycho-core/src/main/java/org/eclipse/tycho/p2tools/TychoMirrorApplication.java
+++ b/tycho-core/src/main/java/org/eclipse/tycho/p2tools/TychoMirrorApplication.java
@@ -217,10 +217,13 @@ private static URI getNormalizedLocation(RepositoryReference r) {
 
     @Override
     protected void finalizeRepositories() {
-        Collection<IRepositoryReference> references = getDestinationMetadataRepository().getReferences();
-        if (!references.isEmpty()) {
-            LOGGER.info("Adding references to the following repositories:");
-            references.stream().map(r -> r.getLocation()).distinct().forEach(loc -> LOGGER.info("  {}", loc));
+        IMetadataRepository repository = getDestinationMetadataRepository();
+        if (repository != null) {
+            Collection<IRepositoryReference> references = repository.getReferences();
+            if (!references.isEmpty()) {
+                LOGGER.info("Adding references to the following repositories:");
+                references.stream().map(r -> r.getLocation()).distinct().forEach(loc -> LOGGER.info("  {}", loc));
+            }
         }
         super.finalizeRepositories();
     }