$ perl -MPDL::Graphics::PLplot -le 'print "ok";' Can't locate PDL/Graphics/PLplot.pm in @INC (you may need to install the PDL::Graphics::PLplot module) (@INC contains: /home/sisyphus/perl-5.32.0-d/lib/site_perl/5.32.0/x86_64-linux /home/sisyphus/perl-5.32.0-d/lib/site_perl/5.32.0 /home/sisyphus/perl-5.32.0-d/lib/5.32.0/x86_64-linux /home/sisyphus/perl-5.32.0-d/lib/5.32.0). BEGIN failed--compilation aborted.