diff --git a/.gitignore b/.gitignore
index 40fe639..dcf0537 100644
--- a/.gitignore
+++ b/.gitignore
@@ -3,3 +3,4 @@
 *.yml
 docker-compose.yml
 data/*
+env
diff --git a/Makefile b/Makefile
index ac3853f..0094ff0 100644
--- a/Makefile
+++ b/Makefile
@@ -9,13 +9,28 @@ core_download_version = $(shell ./version.sh core)
 webapp_version = $(shell docker run --rm $(docker_repo)/kopano_webapp cat /kopano/buildversion | tail -n 1 | grep -o -P '(?<=-).*(?=\+)')
 webapp_download_version = $(shell ./version.sh webapp)
 
+KOPANO_CORE_REPOSITORY_URL := file:/kopano/repo/core
+KOPANO_WEBAPP_REPOSITORY_URL := file:/kopano/repo/webapp
+RELEASE_KEY_DOWNLOAD := 0
+DOWNLOAD_COMMUNITY_PACKAGES := 1
+
+include env
+export
+
+# convert lowercase componentname to uppercase
 COMPONENT = $(shell echo $(component) | tr a-z A-Z)
 
 build-all: build-ssl build-base build-core build-webapp
 
 build: component ?= base
 build:
-	docker build --build-arg KOPANO_$(COMPONENT)_VERSION=${$(component)_download_version} -t $(docker_repo)/kopano_$(component) $(component)/
+	docker build \
+		--build-arg KOPANO_$(COMPONENT)_VERSION=${$(component)_download_version} \
+		--build-arg KOPANO_CORE_REPOSITORY_URL=$(KOPANO_CORE_REPOSITORY_URL) \
+		--build-arg KOPANO_WEBAPP_REPOSITORY_URL=$(KOPANO_WEBAPP_REPOSITORY_URL) \
+		--build-arg RELEASE_KEY_DOWNLOAD=$(RELEASE_KEY_DOWNLOAD) \
+		--build-arg DOWNLOAD_COMMUNITY_PACKAGES=$(DOWNLOAD_COMMUNITY_PACKAGES) \
+		-t $(docker_repo)/kopano_$(component) $(component)/
 
 build-base:
 	component=base make build
diff --git a/README.md b/README.md
index ed79dfd..73a4336 100644
--- a/README.md
+++ b/README.md
@@ -3,7 +3,8 @@
 New instructions:
 
 - explain Makefile
-- `make docker_repo=kopano build-all` to upload to a custom docker hub account
+- `make docker_repo=kopano publish` to upload to a custom docker hub account
+
 
 ## Getting started with docker-compose
 
diff --git a/env-example b/env-example
new file mode 100644
index 0000000..98c4adf
--- /dev/null
+++ b/env-example
@@ -0,0 +1,5 @@
+# modify below to build a different version, than the kopano nightly release
+KOPANO_CORE_REPOSITORY_URL=https://serial:xxxx@download.kopano.io/supported/core:/final/Debian_9.0/
+KOPANO_WEBAPP_REPOSITORY_URL=https://serial:xxxx@download.kopano.io/supported/webapp:/final/Debian_9.0/
+RELEASE_KEY_DOWNLOAD=1
+DOWNLOAD_COMMUNITY_PACKAGES=0
diff --git a/version.sh b/version.sh
index 9b3b911..5d9b402 100755
--- a/version.sh
+++ b/version.sh
@@ -8,6 +8,26 @@ source base/create-kopano-repo.sh
 
 component=${1:-core}
 
+if [ -e ./env ]; then
+	source ./env
+fi
+KOPANO_CORE_REPOSITORY_URL=${KOPANO_CORE_REPOSITORY_URL:-""}
+KOPANO_WEBAPP_REPOSITORY_URL=${KOPANO_WEBAPP_REPOSITORY_URL:-""}
+
+if [[ $KOPANO_CORE_REPOSITORY_URL == http* ]] || [[ $KOPANO_WEBAPP_REPOSITORY_URL == http* ]]; then
+	case $component in
+	core)
+		version=$(curl -s -S -L $KOPANO_CORE_REPOSITORY_URL/Packages | grep -A2 "Package: kopano-server-packages")
+		echo "${version##* }"
+		;;
+	webapp)
+		version=$(curl -s -S -L $KOPANO_WEBAPP_REPOSITORY_URL/Packages | grep -m1 -A1 "Package: kopano-webapp")
+		echo "${version##* }"
+		;;
+	esac
+	exit
+fi
+
 # query community server by h5ai API
 filename=$(h5ai_query "$component")