Hi, So I'm not *entirely* sure if this caused it, but I noticed that doing make -C linux M=/path/to/extmod/ modules_install stopped working. This is because here: > > -extmod_prefix = $(if $(KBUILD_EXTMOD),$(KBUILD_EXTMOD)/) > +export extmod_prefix = $(if $(KBUILD_EXTMOD),$(KBUILD_EXTMOD)/) (as before, of course) another trailing / is added to the M= argument, and then > +modules := $(patsubst $(extmod_prefix)%, $(dst)/%, $(modules)) this patsubst turns out to do nothing. So $(modules) contains the original paths where the modules were compiled, and consequently nothing happens. Specifying make -C linux M=/path/to/extmod modules_install actually works. Obviously I can work around it, but it hardly seems intentional? Thanks, johannes