[gentoo-user] Switching off a long list of USE flags

[gevisz]

I would like to build sane-backend only for one specific scanner.

However, there are a huge lot of different USE flags for other scanners
that are already switched on by default.

Is there any easy way to switch them off?

Something like:

          media-gfx/sane-backends -sane_backends* sane_backends_hp

Exactly that way does not work, but may be something like that...

...instead of directly switching off every one of them.