diff --git a/Makefile b/Makefile
index 6208637b8..195573aab 100644
--- a/Makefile
+++ b/Makefile
@@ -5,6 +5,10 @@ build:
 	./bin/etcdctl version
 	./bin/etcdutl version
 
+.PHONY: tools
+tools:
+	GO_BUILD_FLAGS="${GO_BUILD_FLAGS} -v" ./scripts/build_tools.sh
+
 # Tests
 
 GO_TEST_FLAGS?=
diff --git a/tools/rw-heatmaps/rw-benchmark.sh b/tools/rw-heatmaps/rw-benchmark.sh
index abd63db1a..66d89cdd8 100755
--- a/tools/rw-heatmaps/rw-benchmark.sh
+++ b/tools/rw-heatmaps/rw-benchmark.sh
@@ -198,6 +198,7 @@ for RATIO_STR in ${RATIO_LIST}; do
         fi
         LINE="${LINE},${RD_QPS}:${WR_QPS}"
       done
+      LINE="${LINE},"
       END=$(date +%s)
       DIFF=$((${END} - ${START}))
       echo "took ${DIFF} seconds"