In a larger workflow yml file, the following snippet of code causes an error with my workflow. I can’t figure out why, though. Is there a valid reason for this to cause an error? Since my env setting is at the top level of the workflow, it seems like it should be available for defining a matrix inside of a job inside the workflow.

Can somebody help me fix this, or is it a workflow bug?

name: Test and possibly Publish
on:

pull_request:

push:
env:

default-python: 3.8
jobs:

tests:

runs-on: ${{ matrix.os }}

strategy:

matrix:

os: [ubuntu-latest]

python-version: [3.6, 3.7, 3.8, 3.9]

include:

- os: windows-latest

python-version: ${{ env.default-python }}

- os: macos-latest

python-version: ${{ env.default-python }}
[...]

Github gives me the following error for the line above

Invalid workflow file
The workflow is not valid.

.github/workflows/on-push.yml (Line: 59, Col: 29): Unrecognized named-value: 'env'. Located at position 1 within expression: env.default-python,

.github/workflows/on-push.yml (Line: 61, Col: 29): Unrecognized named-value: 'env'. Located at position 1 within expression: env.default-python