cpanm --look Statistics::R perl -I. Makefile.PL gmake test ::gmake install #### t/03-run.t ......... 4/? # R version 4.1.0 found at C:\Program Files\R\R-4.1.0\bin\x64\R.EXE # Failed test 'IO' # at t/03-run.t line 53. # got: '' # expected: 'Some innocuous message on stderr' # Failed test at t/03-run.t line 56. # got: 'Some innocuous message on stderrSome innocuous message on stdout' # expected: 'Some innocuous message on stdout' # Looks like you failed 2 tests of 21. t/03-run.t ......... Dubious, test returned 2 (wstat 512, 0x200) Failed 2/21 subtests