Package rcom build failure report

Build errors
ERROR: configuration failed for package 'rcom'
Build output
* checking for file 'rcom/DESCRIPTION' ... OK * preparing 'rcom': * checking DESCRIPTION meta-information ... OK * cleaning src * 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 'rcom' ... Package 'rcom' can only be installed/used under Windows. ** Removing '/private/tmp/Rinst.4730/rcom' ERROR * installation failed