Perl 5.36 T:\>nytprofhtml nytprof.out
Reading nytprof.out
Processing nytprof.out data
Writing line reports to nytprof directory
  99% ... Unable to open '/usr/lib/x86_64-linux-gnu/perl-base/XSLoader.pm' for reading: No such file or directory
 100% ... Unable to open '/usr/lib/x86_64-linux-gnu/perl-base/strict.pm' for reading: No such file or directory

Extracting subroutine call data ...
Extracting subroutine links
Generating subroutine stack flame graph ...