--- a/maven/src/org/netbeans/modules/maven/NbMavenProjectImpl.java	
+++ a/maven/src/org/netbeans/modules/maven/NbMavenProjectImpl.java	
@@ -841,7 +841,7 @@ 
                 initialized = true;
                 lookup = createBasicLookup();
                 setLookups(lookup);
-                Lookup lkp = LookupProviderSupport.createCompositeLookup(new PackagingTypeDependentLookup(watcher, lookup), "Projects/org-netbeans-modules-maven/Lookup");
+                Lookup lkp = new PackagingTypeDependentLookup(watcher, lookup);
                 assert checkForForbiddenMergers(lkp) : "Cannot have a LookupMerger for ProjectInformation or SharabilityQueryImplementation";
                 setLookups(lkp); //NOI18N
             }
@@ -871,7 +871,7 @@ 
             }
             if (!newPackaging.equals(packaging)) {
                 packaging = newPackaging;
-                setLookups(LookupProviderSupport.createCompositeLookup(lookup, "Projects/org-netbeans-modules-maven/" + packaging + "/Lookup"));
+                setLookups(LookupProviderSupport.createCompositeLookup(lookup, "Projects/org-netbeans-modules-maven/" + packaging + "/Lookup", "Projects/org-netbeans-modules-maven/Lookup"));
             }
         }
 
--- a/projectapi/src/org/netbeans/spi/project/support/LookupProviderSupport.java	
+++ a/projectapi/src/org/netbeans/spi/project/support/LookupProviderSupport.java	
@@ -45,6 +45,7 @@ 
 package org.netbeans.spi.project.support;
 
 import java.util.ArrayList;
+import java.util.Arrays;
 import java.util.Collection;
 import javax.swing.event.ChangeEvent;
 import javax.swing.event.ChangeListener;
@@ -58,6 +59,7 @@ 
 import org.openide.util.LookupEvent;
 import org.openide.util.LookupListener;
 import org.openide.util.lookup.Lookups;
+import org.openide.util.lookup.ProxyLookup;
 
 /**
  * Factory for lookup capable of merging content from registered 
@@ -82,6 +84,13 @@ 
     public static Lookup createCompositeLookup(Lookup baseLookup, String folderPath) {
         return new DelegatingLookupImpl(baseLookup, Lookups.forPath(folderPath), folderPath);
     }
+    public static Lookup createCompositeLookup(Lookup baseLookup, String... folderPaths) {
+        Lookup[] providers = new Lookup[folderPaths.length];
+        for (int i = 0; i < folderPaths.length; i++) {
+            providers[i] = Lookups.forPath(folderPaths[i]);
+        }
+        return new DelegatingLookupImpl(baseLookup, new ProxyLookup(providers), Arrays.toString(folderPaths));
+    }
     
     /**
      * Factory method for creating {@link org.netbeans.spi.project.LookupMerger} instance that merges