Found the following significant warnings:
  Warning: unable to re-encode 'cpe.R' line 138
  Warning: unable to re-encode 'crm.R' line 104
See '/home/hornik/tmp/R.check/r-devel-clang/Work/PKGS/precautionary.Rcheck/00install.out' for details.
installed size is  6.3Mb
  sub-directories of 1Mb or more:
    doc    2.9Mb
    libs   2.3Mb
Namespace in Imports field not imported from: ‘parallelly’
  All declared Imports should be used.
Namespace in Imports field not imported from: ‘parallelly’
  All declared Imports should be used.
Installation failed.
See ‘/home/ripley/R/packages/tests32/precautionary.Rcheck/00install.out’ for details.
Installation failed.
See ‘/Volumes/Builds/packages/big-sur-arm64/results/4.1/precautionary.Rcheck/00install.out’ for details.
Installation failed.
See ‘/Volumes/Builds/packages/high-sierra-x86_64/results/4.1/precautionary.Rcheck/00install.out’ for details.
Installation failed.
See ‘/Volumes/Builds/packages/high-sierra-x86_64/results/4.0/precautionary.Rcheck/00install.out’ for details.