GetOptions(
   'wwwroot:s'   => (\my $wwwroot),
   'staticdir:s' => (\my $outdir),
   'server:s'    => (\my $server),
   'node:i'      => (\my @nodes),
   'htaccess:s'  => (\my $htaccess),
   'savepath:s'  => (\my $savepath),
);
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Are you trying to force the references into list context with the parentheses? It won't work. Are you using the parentheses because my takes a list and will affect subsequent list members? It doesn't:

$ perl -Mwarnings -Mstrict -e' my $x, $y;'
Parentheses missing around "my" list at -e line 1.
Global symbol "$y" requires explicit package name at -e line 1.
Execution of -e aborted due to compilation errors.
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