* installing *source* package ‘cairoDevice’ ...
** package ‘cairoDevice’ successfully unpacked and MD5 sums checked
** using staged installation
checking for pkg-config... pkg-config
ERROR: gtk+2.0 not found by pkg-config.
ERROR: configuration failed for package ‘cairoDevice’
* removing ‘/Volumes/Builds/packages/big-sur-arm64/results/4.1/cairoDevice.Rcheck/cairoDevice’