Job concurrency group ignored for build matrix

Hi, I’m trying to limit job concurrency as per this documentation: Workflow syntax for GitHub Actions - GitHub Docs

I’ve added concurrency: my_group to the job (which runs twice due to different configurations in a build matrix). However, this seems to be ignored, and the two jobs run in parallel. I would like them to run sequentially.

Is the jobs.<job_id>.concurrency not yet supported for build matrices?

The site won’t let me edit or delete this question, but I found a solution: the max-parallel attribute for build matrices can prevent jobs from running in parallel. Interestingly, when I removed the build matrix and manually created the two jobs, the concurrency attribute still didn’t prevent them from running in parallel.