Try --python which python

https://docs.astral.sh/ty/modules/#third-party-modules

Author: simonw

.github/workflows/test.yml

@@ -46,7 +46,7 @@ jobs:
     - name: run flake8
       run: flake8
     - name: run ty
-      run: python -m ty check sqlite_utils
+      run: ty check sqlite_utils --python "$(which python)"
     - name: Check formatting
       run: black . --check
     - name: Check if cog needs to be run