Specify python3 -m pip

.pre-commit-run-mypy.sh

@@ -9,13 +9,14 @@ set -o errexit
 cd "$(dirname "$0")"
 
 which pip
+which python3
 
 # Install the dependencies into the mypy env.
 # Note that this can take seconds to run.
 # export POETRY_HOME=~/poetry
 # python3 -m venv $POETRY_HOME
 # $POETRY_HOME/bin/
-pip install poetry==1.8.2
+python3 -m pip install poetry==1.8.2
 
 poetry config virtualenvs.in-project true
 poetry install --with dev