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<jabranham> Does cache.nixos.org not serve a binary package for the kernel?
<jabranham> I'm trying to do the first "nixos-rebuild switch --upgrade" on a raspberry pi 3 B+ and nix keeps insisting that it needs to compile the kernel.
<samueldr> it does serve everything, but depending on which commit you're using, it might not be cached
<samueldr> the channels will not wait for aarch64 to complete building
<samueldr> well, the nixos-* channels
<clever> ahh, that would explain it
<samueldr> (and additionally, it could happen that there's a bug making it fail to build, or that it failed due to misc. failures in hydra)
<jabranham> Is there a way to specify an older commit?
<clever> jabranham: did it happen immediately after first installing, or did a nix-channel command break it"
<clever> ?
<jabranham> immediately
<samueldr> >> "nixos-rebuild switch --upgrade"
<samueldr> so clever, ^ after upgrading :)
<clever> yeah, its possible that updating the channel could fix it
<jabranham> so nix-channel --update then nixos-rebuild switch --upgrade?
<clever> `nixos-rebuild switch --upgrade` calls `nix-channel --update` for you
<jabranham> I thought that nix-channel for root was separate from the nixos- stuff?
<samueldr> seems the kernel recently timed out in hydra for aarch64
* samueldr was looking at 18.09
<clever> jabranham: all of the nixos commands use the channel called nixos, on root
<jabranham> clever: gotcha, that makes sense
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<samueldr> jabranham: did you configure a specific kernel, or kept the default?
<samueldr> (in your configuration.nix0
<jabranham> I've tried both "boot.kernelPackages = pkgs.linuxPackages_latest;" as suggested here https://nixos.wiki/wiki/NixOS_on_ARM#Getting_the_installer as well as commenting that out and keeping the default.
<jabranham>
<samueldr> that should be good, though 4.19 is currently "queued" AFAICT
<jabranham> samueldr: so you're saying the default should download a binary?
<samueldr> or uh, I'm again looking at the wrong thing in hydra :/
<jabranham> well now it's trying to compile strace.
<jabranham> :-/
<samueldr> AFAICT, it's possible 4.14 might be built for the channel :/
<samueldr> seems like aarch64 is behind a bit
<samueldr> wonder if something is up
<jabranham> I'm not even sure why strace is getting pulled in TBH
<jabranham> ugh, now it's compiling systemd :-(
<jabranham> I've never compiled systemd. Any idea how long to expect?
<lopsided98> The kernel is not in the cache for me, but strace and systemd are
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<lopsided98> Actually, I'm not sure about systemd, it might just be in my local cache
<samueldr> (and your particular revision of nixpkgs)
<lopsided98> For the latest version of nixos-unstable
<lopsided98> My paths: strace: /nix/store/ng9srswaw4mjv8yajxz0fz64kzs0p5qj-strace-4.25
<lopsided98> systemd: /nix/store/8f0p6kn0pmiwkpa93h1a7jqspad0j898-systemd-239
<lopsided98> systemd is not in the cache AFAICT
<jabranham> it's still compiling for me. Step 83/1500 :-/
<samueldr> nope, /nix/store/8f0p6kn0pmiwkpa93h1a7jqspad0j898-systemd-239 isn't in cache.nixos.org
<samueldr> strace seems to be though
<samueldr> (at least, your paths)
<samueldr> nix-store --realise will download when possible even on non-aarch64
<lopsided98> My local hydra instance builds anything that I need that is missing in cache.nixos.org, so its harder to tell what isn't in the official cache
<jabranham> lopsided98: I'm not fancy enough for that yet. I only started using nixos a week or two ago.
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