nixos/modules/base/nix.nix

57 lines
1.9 KiB
Nix

{
nix-index-database,
nixpkgs-unstable,
nixpkgs,
...
}: {
imports = [
nix-index-database.nixosModules.nix-index
];
nix = {
# https://nixos.wiki/wiki/Storage_optimization
gc = {
# Automatically run the nix garbage collector, removing files from
# the store that are not referenced by any generation.
# https://nixos.org/manual/nix/stable/package-management/garbage-collection
automatic = true;
dates = "weekly";
options = "--delete-older-than 7d";
};
settings = {
# Automatically optimise the store after each build. Store optimisation
# reduces nix store space by 25-35% by finding identical files and
# hard-linking them to each other.
# https://nixos.org/manual/nix/unstable/command-ref/nix-store/optimise.html
auto-optimise-store = true;
# Enable flakes
experimental-features = ["nix-command" "flakes" "repl-flake"];
# Timeout connections to the binary cache instead of waiting forever
connect-timeout = 5;
};
# The nix registry is used to refer to flakes using symbolic identifiers
# when running commands such as `nix run nixpkgs#hello`. By default,
# the global registry from [1] is used, which aliases `nixpkgs` to the
# nixpkgs-unstable branch. We overwrite the default global `nixpkgs`
# registry with one which refers to the same nixpkgs as the rest of
# the system, aligning it with flake.lock.
# [1] https://github.com/NixOS/flake-registry/blob/master/flake-registry.json
registry = {
nixpkgs.flake = nixpkgs;
nixpkgs-unstable.flake = nixpkgs-unstable;
};
};
# The system-wide garbage collection service configured above does not know
# about our user profile. TODO: 24.04
# home-manager.users.caspervk.nix.gc = config.nix.gc;
# https://github.com/nix-community/comma
programs.nix-index-database.comma.enable = true;
programs.command-not-found.enable = false;
}