I think there is a misunderstanding, the hash of the package derivation depends on the build output. We assume it's always the same which allow us to look it up based on the input hash but it's not always true. For example if the build adds the current time to the build output it will not always be the same.
On Tue, 11 Oct 2016, 02:48 Domen Kožar, <do...@dev.si> wrote: > You're running the build system in parallel. For example Makefiles, they > are not pure and thus builds can fail due to race conditions. > We have quite a few disabled for that reason and also that's why you have > to explicitly enable parallel building. > > On Tue, Oct 11, 2016 at 1:56 AM, Ruben Astudillo <ruben.as...@gmail.com> > wrote: > > On reading `nixos-option nix.buildCores`, it says that this option can > affect the determinism of the build. I don't understand how is important > as the hash of the package depends on the default.nix file, not the > build process. What does it mean to be non-deterministic in this case? > > -- Ruben Astudillo > _______________________________________________ > nix-dev mailing list > nix-dev@lists.science.uu.nl > http://lists.science.uu.nl/mailman/listinfo/nix-dev > > > _______________________________________________ > nix-dev mailing list > nix-dev@lists.science.uu.nl > http://lists.science.uu.nl/mailman/listinfo/nix-dev >
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