diff --git a/Makefile b/Makefile
index 1e9a08a8..5e6985a5 100644
--- a/Makefile
+++ b/Makefile
@@ -24,8 +24,8 @@ VERSION:=$(shell git describe --tags --dirty)
 # TAG is the tag of the container image, default to binary version.
 TAG?=$(VERSION)
 
-# PROJ is the image project.
-PROJ?=k8s.gcr.io
+# REGISTRY is the container registry to push into.
+REGISTRY?=staging-k8s.gcr.io
 
 # UPLOAD_PATH is the cloud storage path to upload release tar.
 UPLOAD_PATH?=gs://kubernetes-release
@@ -42,7 +42,7 @@ PKG_SOURCES:=$(shell find pkg cmd -name '*.go')
 TARBALL:=node-problem-detector-$(VERSION).tar.gz
 
 # IMAGE is the image name of the node problem detector container image.
-IMAGE:=$(PROJ)/node-problem-detector:$(TAG)
+IMAGE:=$(REGISTRY)/node-problem-detector:$(TAG)
 
 # ENABLE_JOURNALD enables build journald support or not. Building journald support needs libsystemd-dev
 # or libsystemd-journal-dev.
diff --git a/README.md b/README.md
index 36aca5a9..8049e004 100644
--- a/README.md
+++ b/README.md
@@ -87,7 +87,7 @@ Run `make` in the top directory. It will:
 
 ## Push Image
 `make push` uploads the docker image to registry. By default, the image will be uploaded to
-`k8s.gcr.io`. It's easy to modify the `Makefile` to push the image
+`staging-k8s.gcr.io`. It's easy to modify the `Makefile` to push the image
 to another registry.
 
 ## Start DaemonSet
diff --git a/pkg/util/nethealth/Makefile b/pkg/util/nethealth/Makefile
index c72a5b21..d62192e9 100644
--- a/pkg/util/nethealth/Makefile
+++ b/pkg/util/nethealth/Makefile
@@ -17,11 +17,11 @@
 # If you update this image please bump the tag value before pushing.
 #
 # Usage:
-#   [TAG=1.0] [REGISTRY=k8s.gcr.io] make push
+#   [TAG=1.0] [REGISTRY=staging-k8s.gcr.io] make push
 
 # Default registry, arch and tag. This can be overwritten by arguments to make
 TAG?=1.0
-REGISTRY?=k8s.gcr.io
+REGISTRY?=staging-k8s.gcr.io
 ARCH?=amd64
 
 all: build
@@ -33,8 +33,8 @@ build: nethealth
 	docker build -t $(REGISTRY)/kube-nethealth-$(ARCH):$(TAG) .
 
 push: build
-ifeq ($(REGISTRY),k8s.gcr.io)
-	gcloud docker push $(REGISTRY)/kube-nethealth-$(ARCH):$(TAG)
+ifeq ($(REGISTRY),staging-k8s.gcr.io)
+	gcloud docker -- push $(REGISTRY)/kube-nethealth-$(ARCH):$(TAG)
 else
 	docker push $(REGISTRY)/kube-nethealth-$(ARCH):$(TAG)
 endif
diff --git a/test/kernel_log_generator/Makefile b/test/kernel_log_generator/Makefile
index 5704b7ac..a20d3065 100644
--- a/test/kernel_log_generator/Makefile
+++ b/test/kernel_log_generator/Makefile
@@ -16,7 +16,7 @@
 
 .PHONY: all build push
 
-PROJ ?= k8s.gcr.io
+PROJ ?= staging-k8s.gcr.io
 TAG := 0.1
 
 all: push