$ cd [パッケージがあるディレクトリ]
$ R CMD build XXX
* checking for file ‘XXX/DESCRIPTION’ ... OK
* preparing ‘XXX’:
* checking DESCRIPTION meta-information ... OK
* checking for LF line-endings in source and make files
* checking for empty or unneeded directories
* building ‘YYY.tar.gz’
$ R CMD INSTALL YYY.tar.gz
* installing to library ‘ZZZ’
* installing *source* package ‘XXX’ ...
** R
** preparing package for lazy loading
** help
*** installing help indices
** building package indices
** testing if installed package can be loaded
* DONE (XXX)