message: fix: small fixes for Makefile
diff: # limitations under the License.
  #
  +# Python version installed; we need 3.8 or 3.7
  +PYTHON=`command -v python3.8 || command -v python3.7`
  +
  .PHONY: install superset venv pre-commit
  install: superset pre-commit
  @@ -59,8 +62,9 @@ update-js:
  venv:
  # Create a virtual environment and activate it (recommended)
  - python3 -m venv venv # setup a python3 virtualenv
  - source venv/bin/activate
  + if ! [ -x "${PYTHON}" ]; then echo "You need Python 3.7 or 3.8 installed"; exit 1; fi
  + test -d venv || ${PYTHON} -m venv venv # setup a python3 virtualenv
  + . venv/bin/activate
  pre-commit:
  # setup pre commit dependencies
  