One workaround is do tweak it slightly, giving you this: 
my $repl = '$1 ';

$repl =~ s/\"/\\"/g;
$repl = qq{"$repl"};

$str =~ s/$path/$repl/eeg;

[download]
Note that this involves an eval so you should be very, very careful what you feed it.

In reply to Re: $1 in variable regex replacement string by tadman
in thread $1 in variable regex replacement string by dvergin

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