* installing *source* package 'aIc' ...
** package 'aIc' successfully unpacked and MD5 sums checked
** using staged installation
** R
** data
** inst
** byte-compile and prepare package for lazy loading
Error in loadNamespace(j <- i[[1L]], c(lib.loc, .libPaths()), versionCheck = vI[[j]]) : 
  there is no package called 'Rfast'
Calls: <Anonymous> ... loadNamespace -> withRestarts -> withOneRestart -> doWithOneRestart
Execution halted
ERROR: lazy loading failed for package 'aIc'
* removing 'd:/Rcompile/CRANpkg/lib/4.3/aIc'
* restoring previous 'd:/Rcompile/CRANpkg/lib/4.3/aIc'