diff --git a/Makefile b/Makefile
index 09c31c1..b364af3 100644
--- a/Makefile
+++ b/Makefile
@@ -2,7 +2,7 @@ DOCKER_IMAGE_NAME = cubetiq/calpine-os-linux:3.13
 DOCKER_IMAGE_SIZE = $(shell docker images --format "{{.Repository}} {{.Size}}" | grep $(DOCKER_IMAGE_NAME) | cut -d\   -f2)
 
 build:
-	$(shell ./src/build.sh)
+	./src/build.sh
 	@echo "Size of the image: ${DOCKER_IMAGE_SIZE}"
 
-.PHONY: build
\ No newline at end of file
+.PHONY: build
diff --git a/src/post-install.sh b/src/post-install.sh
index 6f3f1b3..902f72f 100755
--- a/src/post-install.sh
+++ b/src/post-install.sh
@@ -18,7 +18,7 @@ update-ca-certificates
 /sbin/apk add sudo
 
 # Add wheel group
-echo '%wheel ALL=(ALL) ALL' > /etc/sudoers.d/wheel 
+echo '%wheel ALL=NOPASSWD: ALL' > /etc/sudoers.d/wheel 
 
 # Add an administrator user.
-adduser -D -u1000 cubetiq wheel
\ No newline at end of file
+adduser -D -u1000 cubetiq wheel