-DOB_MODULE_PATH and "local" installation

I’m trying to build OB for use in universal Linux binary package of Avogadro. It has libopenbabel.so in lib/ subdirectory, plugins are in lib/openbabel
What -DOB_MODULE_PATH is needed?
openbabel/ seems to be reasonable
But if I set CMAKE_INSTALL_PREFIX to ‘.’, it’s set to lib/openbabel.


Regards,
Konstantin