message: Fix missing env variable
diff: @@ -30,6 +30,7 @@ jobs:
  -e CCACHE_MAXSIZE=10.0G \
  -e CCACHE_CPP2=1 \
  -e CCACHE_DIR=/ccache \
  + -e PYTHON_VERSION=$PYTHON_VERSION \
  -e PYTHON_BINARY=/opt/python/cp37-cp37m/bin/python3.7 \
  -v $GITHUB_WORKSPACE:/src \
  -v $HOME/.ccache:/ccache \
  @@ -44,6 +45,7 @@ jobs:
  -e CCACHE_MAXSIZE=10.0G \
  -e CCACHE_CPP2=1 \
  -e CCACHE_DIR=/ccache \
  + -e PYTHON_VERSION=$PYTHON_VERSION \
  -e PYTHON_BINARY=/opt/python/cp38-cp38/bin/python3.8 \
  -v $GITHUB_WORKSPACE:/src \
  -v $HOME/.ccache:/ccache \
  @@ -58,6 +60,7 @@ jobs:
  -e CCACHE_MAXSIZE=10.0G \
  -e CCACHE_CPP2=1 \
  -e CCACHE_DIR=/ccache \
  + -e PYTHON_VERSION=$PYTHON_VERSION \
  -e PYTHON_BINARY=/opt/python/cp39-cp39/bin/python3.9 \
  -v $GITHUB_WORKSPACE:/src \
  -v $HOME/.ccache:/ccache \
  