ARCH_CATEGORIES=$(filter $(TARGET_ARCH_CATEGORY_PREFIX)/%, $(CATEGORIES))
OS_CATEGORIES=$(filter-out $(foreach arch, $(KNOWN_ARCHS), $(TARGET_OS_CATEGORY_PREFIX)/$(arch)/%), $(filter $(TARGET_OS_CATEGORY_PREFIX)/%, $(CATEGORIES)))
ARCH_CATEGORIES=$(filter $(TARGET_ARCH_CATEGORY_PREFIX)/%, $(CATEGORIES))
OS_CATEGORIES=$(filter-out $(foreach arch, $(KNOWN_ARCHS), $(TARGET_OS_CATEGORY_PREFIX)/$(arch)/%), $(filter $(TARGET_OS_CATEGORY_PREFIX)/%, $(CATEGORIES)))