I had a similar problem. I solved it by importing the packages in the
manifest-file, like the error-message says. In your example:
Bundle "fraghost.jar":
MANIFEST for fraghost.jar:
------------------------------------
Manifest-Version: 1.0
Created-By: 1.5.0_10 (Sun Microsystems Inc.)
Bundle-Name: FragHost
Bundle-SymbolicName: FragHost
Bundle-ManifestVersion: 2
Bundle-Version: 1.0.0
Bundle-Activator: com.test.fraghost.FragHost
Import-Package: org.osgi.framework*, com.test.frag
...
*
But in my opinion it would be more dynamic, if felix would abandon this
import.