BUILD_DIR ?= $(CURDIR)/_build
INSTALL_DIR ?= $(CURDIR)/_install
PKG_VERSION ?= $(shell git describe --abbrev=0 | cut -d- -f1 | cut -dv -f2)
-PKG_SUFFIX ?= $(shell git log --oneline $$(git describe --abbrev=0).. . | wc -l)
+PKG_SUFFIX ?= $(shell git log --oneline v$(PKG_VERSION)-rc0.. . | wc -l)
JOBS := $(if $(shell [ -f /proc/cpuinfo ] && head /proc/cpuinfo),\
$(shell grep -c ^processor /proc/cpuinfo), 2)