diff --git a/libbeat/scripts/Makefile b/libbeat/scripts/Makefile
index 8ffae60348e..bc759f58677 100755
--- a/libbeat/scripts/Makefile
+++ b/libbeat/scripts/Makefile
@@ -41,7 +41,7 @@ export PATH := ./bin:$(PATH)
 GOFILES = $(shell find . -type f -name '*.go' 2>/dev/null)
 GOFILES_NOVENDOR = $(shell find . -type f -name '*.go' -not -path "*/vendor/*" 2>/dev/null)
 GOFILES_ALL = $(GOFILES) $(shell find $(ES_BEATS) -type f -name '*.go' 2>/dev/null)
-GOPACKAGES_STRESSTESTS=$(shell find . -name '*.go' 2>/dev/null | xargs awk 'FNR>1 {nextfile} /\+build.*stresstest/ {print FILENAME; nextfile}' | xargs dirname | uniq)
+GOPACKAGES_STRESSTESTS=$(shell find . -name '*.go' 2>/dev/null | xargs grep -l '\+build.*stresstest' | xargs -n1 dirname | uniq)
 SHELL=bash
 ES_HOST?=elasticsearch
 ES_PORT?=9200