Hello
Recently I’ve switched from 23.05 to unstable. I’m trying to go back but I keep getting an error that I don’t know how to fix
I’ve tried sudo nix flake update
, sudo nix-collect-garbage -d
and sudo nixos-rebuild switch --flake '<path>/.#nixos'
without success.
I have this in my flake.nix
{
inputs = {
nixpkgs.url = "github:nixos/nixpkgs/nixos-23.05"; # was unstable for a couple weeks
impermanence.url = "github:nix-community/impermanence";
home-manager.url = "github:nix-community/home-manager";
home-manager.inputs.nixpkgs.follows = "nixpkgs";
};
...
After committing every file in my config repo (to avoid the dirty warning) and running the nixos-rebuild command, I’m getting:
building the system configuration...
error:
… while calling the 'head' builtin
at /nix/store/7k8b7jmwa2vd52hjby4z1s6p00ifvbkr-source/lib/attrsets.nix:816:11:
815| || pred here (elemAt values 1) (head values) then
816| head values
| ^
817| else
… while evaluating the attribute 'value'
at /nix/store/7k8b7jmwa2vd52hjby4z1s6p00ifvbkr-source/lib/modules.nix:759:9:
758| in warnDeprecation opt //
759| { value = builtins.addErrorContext "while evaluating the option `${showOption loc}':" value;
| ^
760| inherit (res.defsFinal') highestPrio;
(stack trace truncated; use '--show-trace' to show the full trace)
error: eza cannot be found in pkgs
After this, anytime I re-run the nixos-rebuild command, I have this error:
building the system configuration...
error: cached failure of attribute 'nixosConfigurations.nixos.config.system.build.toplevel'
But if I run rg eza
to check if I have missed removing eza
, nothing is found in my config files.
For the record, I was on stable with exa installed for months. Then I switched to unstable, exa being deprecated recently, I used the new project eza (which is not in 23.05 channel).
But now I’m stuck with this error. I thought switching channel would be pain free but apparently, it’s more complex than I thought and I don’t know what to do. I’ve searched in the wiki, reddit, etc…
Thank you for any help! I’m stuck for days.