In reply to @avaq:matrix.org
Oh? And then there's no need to mention the system architecture? :o

In reply to @avaq:matrix.org
I'm also curious about how import inputs.x works. I thought input.x is an attribute set referring to the outputs of the flake you've imported. But it's also an import path referring to the source of what you've imported?!

In reply to @petrichor:envs.net
flakes are attribute sets with _type = "flake", but when coerced to a string (builtins.toString) or a path (builtins.toPath) they resolve to the flake's store path

In reply to @petrichor:envs.net
i think your overlay could look like final: prev: { unstable = import inputs.unstable { inherit (prev) system config; } but you might get away with omitting system

In reply to @janik0:matrix.org
of course, how else would I get people to do free qa :D

In reply to @ryoschin:matrix.org
When using flakes to manage my system, and having `nixos-unstable` and `home-manager` as inputs, I have to call `sudo nixos-rebuild switch --flake some/path`. Now, that command sometimes downloads around 300 MB of data before actually doing the build (around 150 MB for unstable I suppose, and 148 MB for home-manager). Is it possible to avoid having to wait for that every time? I suppose it might do the downloading when I run `sudo nix-collect-garbage -d` and reboot. (Copied from NixOs, this room might be more suitable for this question)

you can try with --offline then it will try to run any nix * command with the local data from nix cache also stops nix shell and nix run from trying to refresh the remote nix version. Alternatively you can do:

  nix.registry = {
    nixpkgs.flake = inputs.nixpkgs;
  };

that pins any nix * command to the same flake.lock version (similar to what channels or npins or nivs would do for nix-* commands)

In reply to @janik0:matrix.org

you can try with --offline then it will try to run any nix * command with the local data from nix cache also stops nix shell and nix run from trying to refresh the remote nix version. Alternatively you can do:

  nix.registry = {
    nixpkgs.flake = inputs.nixpkgs;
  };

that pins any nix * command to the same flake.lock version (similar to what channels or npins or nivs would do for nix-* commands)

In reply to @janik0:matrix.org

you can try with --offline then it will try to run any nix * command with the local data from nix cache also stops nix shell and nix run from trying to refresh the remote nix version. Alternatively you can do:

  nix.registry = {
    nixpkgs.flake = inputs.nixpkgs;
  };

that pins any nix * command to the same flake.lock version (similar to what channels or npins or nivs would do for nix-* commands)

In reply to @ryoschin:matrix.org
But my problem is in that sudo nix-collect-garbage -d deletes the sources, and sudo nixos-rebuild switch --flake some/path has to download them again (I suppose that is because they count as cache, so it clears them). I need the gc to not clear them, and the rebuild command to re-download them only if there is an actual update

In reply to @ryoschin:matrix.org
But my problem is in that sudo nix-collect-garbage -d deletes the sources, and sudo nixos-rebuild switch --flake some/path has to download them again (I suppose that is because they count as cache, so it clears them). I need the gc to not clear them, and the rebuild command to re-download them only if there is an actual update

In reply to @2xsaiko:tchncs.de
if you add those flakes to the local registry then they will not be collected
alternatively I guess you can add them to system.extraDependencies

In reply to @janik0:matrix.org
There was some setting like keepDerivations or something to prevent that but I'm not at my laptop currently.

In reply to @ryoschin:matrix.org
So, as far as I can tell now, all I need to do is make the flake a GC root, right? So, how do I do that...

In reply to @ryoschin:matrix.org
I see. Mind sharing the process?