Hey Richard, Richard Ipsum <richardip...@fastmail.co.uk> writes:
> On Tue, Feb 14, 2017 at 11:29:32AM +0100, Freddy Rietdijk wrote: > Out of interest can I ask what the rationale for that decision is? > > I'd like to try to persuade you not to symlink python to python3, > because doing so potentially breaks existing python2 programs. Please note that the situation in NixOS is a bit different to other distributions. You almost never have python installed globally. All packaged programs refer to one *specific* instance of python of their choosing and it's only availale for themself, not anywhere else. For example, if you install program A which depends on python3, and another program B which depends on python2, they will happily work, but your system *won't* have neither `python2` nor `python3` nor `python` in PATH. The only situation that will change is if a package depends on (or a user installs) "python" instead of either "python3" or "python2". This is then easily fixed by choosing the correct one. Also note that it's generally discouraged to "globally" install a package for development needs. Instead of globally installing python3, firefox and gdb you write a `shell.nix` file in the project directory, run `nix-shell`, and you will get dropped into a shell with the mentioned packages available, *without* having to install anything of it in a global. Other packages (and even your whole system outside that shell) is unaffected.
signature.asc
Description: PGP signature
_______________________________________________ nix-dev mailing list nix-dev@lists.science.uu.nl http://lists.science.uu.nl/mailman/listinfo/nix-dev
