diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index f1cc7ee..3c92a47 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -6,13 +6,11 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@master
-    - name: Build image
-      run: |
-        docker build -t actions-poetry .
-    - name: Print ref
-      run: |
-        echo $GITHUB_REF
-        env
+    - name: Run image
+      uses: ./
+      with:
+        python_version: 3.8.0
+        poetry_version: 0.12.17
     - name: Generate release
       env:
         GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
diff --git a/Dockerfile b/Dockerfile
index fcc48c5..aaa20b3 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,7 +1,7 @@
 FROM python:slim-buster
 
-ENV PYENV_HOME=/root/.pyenv
-ENV PATH $PYENV_HOME/shims:$PYENV_HOME/bin:$PATH
+ENV PYENV_ROOT=/root/.pyenv
+ENV PATH $PYENV_ROOT/shims:$PYENV_ROOT/bin:$PATH
 
 RUN apt-get update \
     && apt-get install -y --no-install-recommends \
@@ -27,8 +27,8 @@ RUN apt-get update \
     && rm -rf /var/lib/apt/lists/*
 
 # Install pyenv, then install python versions
-RUN git clone --depth 1 https://github.com/pyenv/pyenv.git $PYENV_HOME && \
-    rm -rfv $PYENV_HOME/.git
+RUN git clone --depth 1 https://github.com/pyenv/pyenv.git $PYENV_ROOT && \
+    rm -rfv $PYENV_ROOT/.git
 
 COPY requirements.txt entrypoint.sh /
 ENTRYPOINT ["/entrypoint.sh"]