Hi Marc, >> Can your new-and-improved python expression support [install Python >> 2.5 and 3.0.1 simultaneously]? > > How should it look like? I mean you can install to different profiles > and you're fine.
Yes, I know, but how does your expression support installing different versions of Python? I don't want to copy the entire expression and rename all occurrences of the string "2.5" with "3.0", right? Expressions are functions, so clearly there has to be better way duplicating the entire thing whenever a parameter changes. >> What do you mean by "fix"? What is broken about the current default >> expression? > > One major problem is that a lot of python libraries check for its > dependencies. Only using PYTHONPATH isn't nough in most cases, cause > the import directories do cantain .pth files or such listing more > directories to be added to the import path. We have talked about this particular subject before: http://article.gmane.org/gmane.linux.distributions.nixos/1430 http://article.gmane.org/gmane.linux.distributions.nixos/1447 The second article lists several approaches how to remedy the problems you refer to. Have you seen that article when I posted it back then? I wonder, because you never responded to it, so maybe it got lost in transmission somewhere. It would be really nice if we could find a good solution to this problem, because there are lots of packages that suffer from it (ghc, tex, ruby, etc.), not just Python. Take care, Peter _______________________________________________ nix-dev mailing list nix-dev@cs.uu.nl https://mail.cs.uu.nl/mailman/listinfo/nix-dev
