Failed to install

[Ludwigm6]

Package install fails with error below. I guess this is because of R 4.0.0? CRAN check also failed (you probably know already)

✓  checking for file ‘/tmp/RtmpyIA9Ej/remotes158937e85a783/gisma-uavRmp-6706210/DESCRIPTION’ ...
─  preparing ‘uavRmp’:
✓  checking DESCRIPTION meta-information ...
   Warning in grepl(e, files, perl = TRUE, ignore.case = TRUE) :
     PCRE pattern compilation error
    'unrecognized character follows \'
    at 'inst\examples$'
   Error in grepl(e, files, perl = TRUE, ignore.case = TRUE) : 
     invalid regular expression '^\inst\examples$'
   Execution halted
Error: Failed to install 'uavRmp' from GitHub:
  System command 'R' failed, exit status: 1, stdout + stderr:
E> * checking for file ‘/tmp/RtmpyIA9Ej/remotes158937e85a783/gisma-uavRmp-6706210/DESCRIPTION’ ... OK
E> * preparing ‘uavRmp’:
E> * checking DESCRIPTION meta-information ... OK
E> Warning in grepl(e, files, perl = TRUE, ignore.case = TRUE) :
E>   PCRE pattern compilation error
E>  'unrecognized character follows \'
E>  at 'inst\examples$'
E> Error in grepl(e, files, perl = TRUE, ignore.case = TRUE) : 
E>   invalid regular expression '^\inst\examples$'
E> Execution halted

[gisma]

if not already done, just delete in .Rbuildignore the line containing \inst\examples