Reproducible sources #2

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opened 2020-11-07 19:26:01 +01:00 by simon · 2 comments

simon commented

2020-11-07 19:26:01 +01:00

Owner

I can currently think of two options:

Add nixpkgs (channel), nixpkgs-unstable and home-manager to root’s nix-channel
Pin all three to specific commits and add these pins to the repository (how?)

Possible implementations:

Set nix.nixPath to sources.nixpkgs
- Problems: only gets updated at login, overrides nixos-config in NIX_PATH
Set nix.nixPath to checked out nixpkgs submodule
- Problems: overrides nixos-config in NIX_PATH, uses git submodules (I don’t really like them)
Use a wrapper around nixos-rebuild that passes -I nixpkgs=…
Flakes (see #3)

Plan

Do it like in da3b61d739/nixos/configurations.nix :

nix.nixPath = [
  "home-manager=${home-manager}"
  "nixpkgs=${nixpkgs}"
  "nur=${nur}"
];

Those should always point to the same directory (even on updates) to work around the problem described above.

I can currently think of two options: * Add `nixpkgs` (channel), `nixpkgs-unstable` and `home-manager` to root’s nix-channel * Pin all three to specific commits and add these pins to the repository (how?) Possible implementations: * Set `nix.nixPath` to `sources.nixpkgs` + Problems: only gets updated at login, overrides `nixos-config` in `NIX_PATH` * Set `nix.nixPath` to checked out nixpkgs submodule + Problems: overrides `nixos-config` in `NIX_PATH`, uses git submodules (I don’t really like them) * Use a wrapper around `nixos-rebuild` that passes `-I nixpkgs=…` * Flakes (see #3) ### Plan Do it like in https://github.com/Mic92/dotfiles/blob/da3b61d739d18c14780b58c0828e50fa3187f5aa/nixos/configurations.nix : nix.nixPath = [ "home-manager=${home-manager}" "nixpkgs=${nixpkgs}" "nur=${nur}" ]; Those should always point to the same directory (even on updates) to work around the problem described above.