yes, the calibre built-in cant do that, but
Plugboard, template, and custom composite column recipes
In Preferences_ Save to Disk
you can edit the Save Template
see the description of save template function in attachment.
it mention you can configure the output folder and what filename.
be sure to check the link above.. that was very important
In Preferences_ Metadata Plugboard
you can edit the Source Template with you own needs
because the metadata changes the way template you used.