PERL5LIB and any PERL vars will show up in output of  perl -V so he doesn't have any those, for example 
...
  %ENV:
    PERL_MB_OPT=" --config installhtmldir=  --binhtml= "
  @INC:
...

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In reply to Re^4: Recovery of a "multi-perl" installation by Anonymous Monk
in thread Recovery of a "multi-perl" installation by haricot-48

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