@@ -5,7 +5,7 @@ RUN /setup/apt

 WORKDIR /root

 ARG version=master

-ENV version=$DOCKER_TAG

+ENV version=$version

 RUN /setup/checkout

new file mode 100644

@@ -0,0 +1,2 @@

+docker build --build-arg version=$SOURCE_BRANCH -f $DOCKERFILE_PATH -t $IMAGE_NAME .

+

@@ -5,7 +5,7 @@ git clone git://git.code.sf.net/p/sbcl/sbcl /sbcl-build

 cd /sbcl-build

-if [[ "${version:-"$DOCKER_TAG"}" == "latest" ]]; then

+if [[ "${version}" == "latest" ]]; then

   version=master

 fi