Using RCC to generate .qrc files

hi, i’m using the -project option of the RCC executable to generate .qrc files during build time (to automatically include complete qmldirs as resources). Unfortunately the RCC includes ALL subdirectories (relative to the execute path), but i would prefer if i can specify a subdirectory. Of course, I could execute RCC in the every subdirectory, but then the entries are not relative to the path I want it to be anymore. That would be no problem if I can specify the prefix of the qrc during the execution of RCC. So my question is: Can I specify a subdirectory or the prefix when using the -project option of the RCC ? Thanks