How would you go about (pre)fetching every source in the nixpkgs tree? How large would you estimate the result to be (number of archives/space on disk)?
In the last couple days: * GNU bash silently updated patch 42 ( https://github.com/NixOS/nixpkgs/issues/11475) * OpenSSL moved the 1.0.2d release to the "old" directory (breaking the URL) ( https://github.com/NixOS/nixpkgs/commit/51a5f49d700890a93c36dd50e5eca4bf6ee6966b ) These kind of breakages introduced by the external world erode the promise of Nix that attracted me as a developer: reproducible builds into the future. In this respect alone, Nix + a fixed nixpkgs checkout provides little/no advantage over building in a VM: both work indefinitely as long as you don't introduce new dependencies. I intend to build/test a sort of hermetically sealed Nix where all dependencies are frozen in time (saved somewhere). I suspect I'm not alone in wanting this ( http://permalink.gmane.org/gmane.linux.distributions.nixos/18611). I'd appreciate any tips/guidance/references to related work before I begin.
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