-o $(perf-tar).tar; \
mkdir -p $(perf-tar); \
git --git-dir=$(srctree)/.git rev-parse HEAD > $(perf-tar)/HEAD; \
-tar rf $(perf-tar).tar $(perf-tar)/HEAD; \
+(cd $(srctree)/tools/perf; \
+util/PERF-VERSION-GEN ../../$(perf-tar)/ 2>/dev/null); \
+tar rf $(perf-tar).tar $(perf-tar)/HEAD $(perf-tar)/PERF-VERSION-FILE; \
rm -r $(perf-tar); \
$(if $(findstring tar-src,$@),, \
$(if $(findstring bz2,$@),bzip2, \