diff --git a/Dockerfile b/Dockerfile
index 446089c98..6a112df54 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -48,8 +48,9 @@ ARG VERSION_SHORT=""
 ENV VERSION_SHORT=$VERSION_SHORT
 ARG VERSION_GIT_HASH=""
 ENV VERSION_GIT_HASH=$VERSION_GIT_HASH
+ARG TARGETARCH
 
-RUN go install -tags=xversion -ldflags="\
+RUN GOARCH=$TARGETARCH go install -tags=xversion -ldflags="\
       -X tailscale.com/version.Long=$VERSION_LONG \
       -X tailscale.com/version.Short=$VERSION_SHORT \
       -X tailscale.com/version.GitCommit=$VERSION_GIT_HASH" \
diff --git a/Makefile b/Makefile
index 2b8ce5417..c8262ee61 100644
--- a/Makefile
+++ b/Makefile
@@ -1,3 +1,5 @@
+IMAGE_REPO ?= tailscale/tailscale
+
 usage:
 	echo "See Makefile"
 
@@ -21,6 +23,10 @@ build386:
 buildlinuxarm:
 	GOOS=linux GOARCH=arm go install tailscale.com/cmd/tailscale tailscale.com/cmd/tailscaled
 
+
+buildmultiarchimage:
+	docker buildx build --platform linux/amd64,linux/arm64,linux/arm/v7 -t ${IMAGE_REPO}:latest --push -f Dockerfile .
+
 check: staticcheck vet depaware buildwindows build386 buildlinuxarm
 
 staticcheck: