• using R version 2.15.0 RC (2012-03-27 r58857)
• using platform: i386-apple-darwin9.8.0 (32-bit)
• using session charset: ASCII
• checking for file 'ISOweek/DESCRIPTION' ... OK
• checking extension type ... Package
• this is package 'ISOweek' version '0.6-2'
• checking package namespace information ... OK
• checking package dependencies ... ERROR
  Package required but not available: 'stringr'
  
  Package suggested but not available for checking: 'testthat'
  
  See the information on DESCRIPTION files in the chapter 'Creating R
  packages' of the 'Writing R Extensions' manual.
• elapsed time (check, wall clock): 0:01