diff --git a/synapse/Makefile b/synapse/Makefile
index aa9ec62..f07e813 100644
--- a/synapse/Makefile
+++ b/synapse/Makefile
@@ -13,8 +13,8 @@ decompress:
 	tar -xf v$(VERSION).tar.gz
 
 build:
-	cd ${IMAGE}-${VERSION} && pwd
 	docker buildx build --platform linux/amd64,linux/arm64,linux/arm --push \
       --cache-from=type=registry,ref=${NAMESPACE}/buildx:${IMAGE} \
       --cache-to=type=registry,ref=${NAMESPACE}/buildx:${IMAGE} \
-      --tag ${CI_REGISTRY_IMAGE}/${IMAGE}:$(VERSION) docker
+      --tag ${CI_REGISTRY_IMAGE}/${IMAGE}:$(VERSION) \
+      -f ${IMAGE}-${VERSION}/docker/Dockerfile ${IMAGE}-${VERSION}