* installing *source* package 'pkme' ...
** using staged installation
** R
** byte-compile and prepare package for lazy loading
Error in library(usethis) : there is no package called 'usethis'
Error: unable to load R code in package 'pkme'
Execution halted
ERROR: lazy loading failed for package 'pkme'
* removing 'd:/RCompile/CRANincoming/R-devel/lib/pkme'