Github actions compilation error on macOS

Hi

Recently, I have had problem with my basic R-CMD-check on GitHub Actions for my R-package. The compilation of the C++ code in my package fails with an error message I don't quite get. It seems to have to do with fortran packages not being found.
See the full check log here:

The package runs perfectly fine on R-hub through:

devtools::check_rhub(platforms = "macos-highsierra-release-cran")

Is something wrong on the Github actions end? I tried changing the cache key to rerun without cached R-packages, but the same error turns up.

Any ideas?

There was recently some changes in how gfortran was installed on macOS. It looks like those changes have remedied the situation as more recent builds in your repository are now working.

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