filter_packages = $(filter-out -% $(patsubst -%,%,$(filter -%,$(1))),$(1))
extra_packages = $(if $(filter wpad-mini wpad nas,$(1)),iwinfo)
filter_packages = $(filter-out -% $(patsubst -%,%,$(filter -%,$(1))),$(1))
extra_packages = $(if $(filter wpad-mini wpad nas,$(1)),iwinfo)