CLI flag to ignore guix channel

[jgart]

Hi,

I'd like a CLI flag to be able to ignore channels.

Where should I look if I'd like to implement something like this?

I prefer not to edit and comment out channels in ~/.config/guix/channels.scm

I'd prefer to do the following

guix import crate behemoth-rust-package-foo -r --ignore-channel=guixrus

WDYT