macOS CI builds failing

[jakirkham]

These 2 macOS builds are failing on main (they did not fail on the corresponding PR). Appears to be an issue during ./configure

• https://dev.azure.com/conda-forge/feedstock-builds/_build/results?buildId=632094&view=logs&jobId=a3e8a21a-cf17-5483-5dfe-b752375c22e3&j=a3e8a21a-cf17-5483-5dfe-b752375c22e3&t=71f60cc9-1e13-5dcf-5627-3ead6dfd2a23
• https://dev.azure.com/conda-forge/feedstock-builds/_build/results?buildId=632094&view=logs&jobId=a3e8a21a-cf17-5483-5dfe-b752375c22e3&j=01432d14-c748-56d6-dc23-1dcca69ce254&t=b9a97337-181e-5900-3837-5c876299b4a3

[hmaarrfk]

Maybe it is related to: https://github.com/conda-forge/mpich-feedstock/issues/76

[hmaarrfk]

Not sure how we resolved things, but mpich is failing https://github.com/conda-forge/sirius-feedstock/pull/22