I don't have // in any of my @INC paths: 

$ perl -E 'say for @INC'
/home/ken/perl5/perlbrew/perls/perl-5.34.0/lib/site_perl/5.34.0/cygwin
+-thread-multi
/home/ken/perl5/perlbrew/perls/perl-5.34.0/lib/site_perl/5.34.0
/home/ken/perl5/perlbrew/perls/perl-5.34.0/lib/5.34.0/cygwin-thread-mu
+lti
/home/ken/perl5/perlbrew/perls/perl-5.34.0/lib/5.34.0

[download]

I suspect you may have done something in your installation which caused this; however, without knowing the steps you took, I don't know what that might have been. Do note the differences between your /opt/local/perl5//lib/site_perl/5/34/1 and my /home/ken/perl5/perlbrew/perls/perl-5.34.0/lib/site_perl/5.34.0:

There are potentially a number of things you may need to change.

Having // in a path is not a problem in itself: x/y and x//y are effectively the same. 

$ ls -al x/y
ls: cannot access 'x/y': No such file or directory

$ mkdir -p x/y

$ cd x//y

$ pwd
/home/ken/tmp/x/y

$ cd ../..

$ pwd
/home/ken/tmp

$ cd x/y

$ pwd
/home/ken/tmp/x/y

$ cd ../..

$ pwd
/home/ken/tmp

[download]

— Ken

In reply to Re^3: "Installed" Perl 5.34 , sort of by kcott
in thread "Installed" Perl 5.34 , sort of by misterperl

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.