Author: Michael R. Crusoe
Description: allow us to specify the package version
--- libvcflib.orig/Makefile
+++ libvcflib/Makefile
@@ -136,7 +136,7 @@
 scriptToBin: $(BINS)
 	$(CP) scripts/* $(BIN_DIR)
 
-GIT_VERSION += $(shell git describe --abbrev=4 --dirty --always)
+GIT_VERSION ?= $(shell git describe --abbrev=4 --dirty --always)
 
 CXXFLAGS = -Ofast -D_FILE_OFFSET_BITS=64 -std=c++0x
 #CXXFLAGS = -O2
