Hi, Often I want to package some software. Normally what I do is bring my nixpkgs checkout up to date, create a new branch from master and write the expression.
My problem begins when I set out to try my expression out: if I run nix-env -i <my package> then nix will go out and try to pull in all the latest versions of packages as my tree was updated. While technically that's great and it ensures that my expression builds against what's in master right now, it's very inconvenient during development of the expression itself. My specific example is that I'm writing an expression which depends on Qt4 at the moment so when I try to test it, it goes off to try and build qt4 first (which seems to have been updated somehow). The problem with this is that qt4 takes many, many hours to build if it builds at all so I'm currently stuck waiting either for my box to finish building Qt or for Hydra to finish building it in about 2-3 hours so I can fetch it. This wait is rather sub-optimal if all I care about is ‘does this expression build with my current setup?’. If I'm trying to quickly package something so I can use it 5 minutes later, it's often impossible. How can I ask nix to use the packages I already have installed where possible? I'd rather leave testing of whether it works with current nixpkgs master for later, when I think I'm done writing the expression. Thanks -- Mateusz K. _______________________________________________ nix-dev mailing list nix-dev@lists.science.uu.nl http://lists.science.uu.nl/mailman/listinfo/nix-dev
