You must escape / in regexes ...

A literal delimiter character in a regex like  /...\/.../ must be escaped, but if the delimiter is within an interpolated string (as in the OPed regex), the regex compiler is quite happy with it:

c:\@Work\Perl>perl -wMstrict -le
"my $re = '.../...';
 ;;
 print 'match' if 'xxx/xxx' =~ /$re/;
"
match
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