--- zzzz-none-000/linux-4.1.38/tools/perf/util/PERF-VERSION-GEN	2017-01-18 18:48:06.000000000 +0000
+++ bcm63-7582-715/linux-4.1.38/tools/perf/util/PERF-VERSION-GEN	2020-11-25 10:06:48.000000000 +0000
@@ -25,7 +25,7 @@
 fi
 if test -z "$TAG"
 then
-	TAG=$(MAKEFLAGS= make -sC ../.. kernelversion)
+	TAG=$(MAKEFLAGS= make -sC ../.. kernelversion | grep "^[0-9]")
 fi
 VN="$TAG$CID"
 if test -n "$CID"