I can't figure out how to atlas use a specific version

[iffy]

I've tried the following:

atlas use argparse==4.0.1
atlas use argparse=4.0.1
atlas use [email protected]
atlas use 'argparse == 4.0.1'
atlas use 'argparse = 4.0.1'

How do tell it to use a particular version?

[Araq]

It's a feature we really need but currently lack.

[Clonkk]

To add onto this:

atlas use package@#master

would be useful too