diff --git a/alpine/Dockerfile b/alpine/Dockerfile
index 79a38fa98..66bafcfda 100644
--- a/alpine/Dockerfile
+++ b/alpine/Dockerfile
@@ -51,4 +51,4 @@ RUN \
   rc-update add azure default && \
   true
 
-CMD ["/bin/sh"]
+CMD ["/mkinitrd.sh"]
diff --git a/alpine/Makefile b/alpine/Makefile
index 4d9709d3c..8881561ab 100644
--- a/alpine/Makefile
+++ b/alpine/Makefile
@@ -31,7 +31,7 @@ initrd.img: Dockerfile mkinitrd.sh init $(ETCFILES) common
 	  -C packages/azure etc -C ../.. \
 	  | \
 	  docker build -t moby-initrd:build -
-	docker run --net=none --rm moby-initrd:build /mkinitrd.sh > $@
+	docker run --net=none --rm moby-initrd:build > $@
 
 initrd.img.gz: initrd.img
 	cat initrd.img | gzip -9 > initrd.img.gz