I'm clearly missing something here. All examples run with use strict/warnings

If I load File::Find with: 

use strict;
use warnings;
use File::Find;

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the following error goes away:

Name "File::Find::prune" used only once: possible typo at...

But if I use:

Require File::Find; 
File::Find->import(qw(find));

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the error appears. I am confused by this. Due to a decision by fedora/redhat to remove File::Find from core modules, the Require loading is required, not my choice unfortunately.

In &wanted, I'm trying to prune a directory, following examples and explanations from for example here and in particular here.

This is a simplified example, but shouldn't matter since it's the single occurrence of $File::Find::prune = 1 that is making Perl complain. 
sub wanted {
  if ($File::Find::name =~ m%^/path/detection%){
    $File::Find::prune = 1;
    return;
  }
}

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In reply to Why $FIle::Find::prune = 1 returns used only once error by h2

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