antimake: dont use readpath when loading extensions
antimake: dont use readpath when loading extensions

Seems it's not reliable.

rabbitt/libusual,rabbitt/libusual,markokr/libusual,markokr/libusual,rabbitt/libusual,mgjv/libusual,ifduyue/libusual,markokr/libusual,mgjv/libusual,mgjv/libusual,ifduyue/libusual,ifduyue/libusual,rabbitt/libusual,mgjv/libusual,markokr/libusual,ifduyue/libusual