1 files changed, 1 insertions, 5 deletions
diff --git a/Makefile b/Makefile
index 1a91b0b..82993a4 100644
--- a/Makefile
+++ b/Makefile
@@ -48,11 +48,7 @@ ifdef DEBUG
     PACKER_OPTS += -var='headless=false'
 endif
 
-define check_rootpw
-    ifndef ROOTPW
-        $(error No root password is set, set it as ROOTPW in your environment.)
-    endif
-endef
+check_rootpw = $(if $(strip $(ROOTPW)),,$(error No root password is set, set it as ROOTPW in your environment.))
 
 .PHONY: all help clean
 all: help