[Nix-dev] Python 3 as default

[Peter Simons]

Hi Freddy,

 > Peter, could you explain how it broke your setup?

I have plenty of scripts that run "python" expecting to get python2.

I can fix those scripts, of course. I probably should, and I will.
Still, from a user's point of view, the experience of them suddenly
misbehaving was not a nice one. Especially since it's not quite
obviously to me what the *benefits* that change are.

Best regards,
Peter