Open Atrium Sub Theming on Pantheon

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colinmcm's picture

I'm trying to subtheme my site on Pantheon. I am using a Drush Alias from a Drush install on a Ubuntu VM. Drush commands for installing modules work fine but when I come try:
drush @[alias] oa_radix newsubtheme
I get:
The drush command 'newsubtheme' could not be found. Run drush cache-clear drush to clear the commandfile cache if you have installed new extensions.

I have tried adding
--strict=0
to the command, as well as downloading oa_radix with Drush (this also works fine) and clearing the cache.

Can anyone explain what I can do to make this work?
If I just change the names of the downloaded new oa_radix (now in sites/all/themes) will this work?
Do I have to get gems/compass/sass working for the sub-theme to work?

Thanks

Colin