Not really. All your dies and warnings will be formatted (until someone localises $SIG{__WARN__} or $SIG {__DIE__}). It doesn't format anything generated with print STDERR.

I suggest using IPC::Open3, with "-|" as the fourth argument. This will fork the process, allowing the parent to read STDERR from the child, and hence you are able to format STDERR they way you want.

Abigail