Github action fails to install "jpeg" package

Package development
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I use r-lib/actions/setup-r-dependencies@v2 in my R CMD check action for rgl. Lately it has been failing on MacOS because it can't install the jpeg package. For example,

fix writePLY to handle colors properly · dmurdoch/rgl@9cdf28b · GitHub

Am I doing something wrong here, or is the a problem with the action, or with pak?

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|setup-r-dependencies does not install system packages on macOS, if you are building packages from source, then you need to do that yourself.

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