Re: mercurial with a --pure install option, it seems it might not be possible, I could not find a whole of information about it, and from what little I've seen, it seems it's not possible. Someone with the same issue wrote a little workaround but it's a bit of hack. You can take a look at it here https://groups.google.com/forum/?fromgroups#!topic/turbogears/t9rZAMSj_NQ . Please tell me what you think