I didn't see the gnuflag package. Fixed now.

> In cmd/juju/switch.go:
>
> >  	"github.com/juju/juju/cmd"
> >  	"github.com/juju/juju/cmd/envcmd"
> >  	"github.com/juju/juju/environs"
> > +	"github.com/juju/juju/environs/configstore"
> > +	"github.com/juju/juju/juju"
> > +	"launchpad.net/gnuflag"
>
> The import order should go: standard libraries, other dependencies, 
> this project.
>
> So the last section should be "github.com/juju/juju" and nothing else.
>
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> <https://github.com/juju/juju/pull/20/files#r13419950>.
>