Package mimR build failure report

Build errors
ERROR: configuration failed for package 'mimR'
Build output
* checking for file 'mimR/DESCRIPTION' ... OK
* preparing 'mimR':
* checking DESCRIPTION meta-information ... OK
* checking whether 'INDEX' is up-to-date ... NO
* use '--force' to overwrite the existing 'INDEX'
* removing junk files
* checking for LF line-endings in source files
* checking for empty directories
* building binary distribution
* Installing *source* package 'mimR' ...
Package 'mimR' can only be installed/used under Windows.
** Removing '/private/tmp/Rinst.4824/mimR'
ERROR
* installation failed