diff --git a/.circleci/config.yml b/.circleci/config.yml
index eea78ee..81b14d9 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -94,15 +94,13 @@ jobs:
       - store_artifacts:
           path: ./doc-server
   docker_build:
-    environment:
-      IMAGE_NAME: julienm1/my-awesome-ci-expr
     docker:
       - image: circleci/buildpack-deps:stretch
     steps:
       - checkout
       - setup_remote_docker
-      - run: docker image build --tag $IMAGE_NAME:app .
-      - run: docker save -o image.tar $IMAGE_NAME
+      - run: docker image build --tag julienm1/my-awesome-ci-expr:app .
+      - run: docker save -o image.tar julienm1/my-awesome-ci-expr
       - persist_to_workspace:
         root: .
         paths: