diff --git a/org.hl7.fhir.utilities/src/main/java/org/hl7/fhir/utilities/npm/FilesystemPackageCacheManager.java b/org.hl7.fhir.utilities/src/main/java/org/hl7/fhir/utilities/npm/FilesystemPackageCacheManager.java
index 043161698..5c50fc9eb 100644
--- a/org.hl7.fhir.utilities/src/main/java/org/hl7/fhir/utilities/npm/FilesystemPackageCacheManager.java
+++ b/org.hl7.fhir.utilities/src/main/java/org/hl7/fhir/utilities/npm/FilesystemPackageCacheManager.java
@@ -559,8 +559,10 @@ public class FilesystemPackageCacheManager extends BasePackageCacheManager imple
   public String getPackageId(String canonicalUrl) throws IOException {
     String retVal = findCanonicalInLocalCache(canonicalUrl);
     
-    retVal = super.getPackageId(canonicalUrl);
-
+    if(retVal == null) {
+      retVal = super.getPackageId(canonicalUrl);
+    }
+    
     if (retVal == null) {
       retVal = getPackageIdFromBuildList(canonicalUrl);
     }
@@ -930,4 +932,4 @@ public class FilesystemPackageCacheManager extends BasePackageCacheManager imple
       return false;
   }
 
-}
\ No newline at end of file
+}