Install skin from python addon?

I am trying to install a skin from an addon, the skin is available from a repository and can be installed manually.

I have tried adding the skin to the addon.xml as follows:

Code:
<requires>
  <import addon="skin.mimic" version="5.0.2" />
</requires>

And I have also tried installing it in the addon body as follows:

Code:
xbmc.executebuiltin('InstallAddon(skin.mimic)')

Yet neither way seem to actually install the skin. Any tips ?