The dry-run thing is likely due to replaceDependency doing an import from a derivation, which requires building at evaluation time. There's not really a good way to work around that, unfortunately.
~Shea On Mon, Sep 29, 2014 at 12:52:10AM +0200, Ricardo M. Correia wrote: > On Sun, Sep 28, 2014 at 10:19 AM, Vladimír Čunát <[email protected]> wrote: > > > On 09/25/2014 03:41 PM, Ricardo M. Correia wrote: > > > >> Also, I'm not sure if this is expected, but when I first tried to run > >> "nixos-rebuild dry-run" with this workaround applied, it started to > >> download and compile bash even though the man page of nixos-rebuild > >> specifically says: [...] > >> > > > > IIRC there are two steps -- first build nix, and then do the dry-run (or > > switch or anything else). Nix also needs its bash replaced, so first you > > need to build the bash replacement. That is, unless you specify > > --no-build-nix option. > > > > That's what I thought too after reflecting on it a bit more, but now I'm > starting to think that there is a real bug. > > I just tried to run "nixos-rebuild dry-run" (in preparation for testing > roconner's performance improvement) and it started to compile rustcMaster! > (I'm pretty sure that is not a dependency of nix). > I expected it to do that if I ran "nixos-rebuild switch" or "nixos-rebuild > boot" because I changed it locally, but I didn't expect it to compile when > running "nixos-rebuild dry-run". > > For reference, I am currently running on > e2d06c45b4586203a1838098460ec0a5781c8cf8 (from about 3 days ago). > _______________________________________________ > nix-dev mailing list > [email protected] > http://lists.science.uu.nl/mailman/listinfo/nix-dev _______________________________________________ nix-dev mailing list [email protected] http://lists.science.uu.nl/mailman/listinfo/nix-dev
