cb289a9256
We cannot pass `overlays = ...` to `nixpkgs` directly because by default overlays from `~/.config/nixpkgs` are loaded in there. This doesn't happen by default, but when using `--impure`. Explicitly specifying that ignores these overlays. By using `pkgs.extend` the old behavior can be kept and the new overlay can be applied. Co-authored-by: Silvan Mosberger <contact@infinisil.com>
76 lines
2.6 KiB
Nix
76 lines
2.6 KiB
Nix
# Experimental flake interface to Nixpkgs.
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# See https://github.com/NixOS/rfcs/pull/49 for details.
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{
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description = "A collection of packages for the Nix package manager";
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outputs = { self }:
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let
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jobs = import ./pkgs/top-level/release.nix {
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nixpkgs = self;
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};
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libVersionInfoOverlay = import ./lib/flake-version-info.nix self;
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lib = (import ./lib).extend libVersionInfoOverlay;
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forAllSystems = lib.genAttrs lib.systems.flakeExposed;
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in
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{
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overlays.setLibVersionInfo = final: prev: {
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lib = prev.lib.extend libVersionInfoOverlay;
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};
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lib = lib.extend (final: prev: {
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nixos = import ./nixos/lib { lib = final; };
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nixosSystem = args:
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import ./nixos/lib/eval-config.nix (
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args // { inherit (self) lib; } // lib.optionalAttrs (! args?system) {
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# Allow system to be set modularly in nixpkgs.system.
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# We set it to null, to remove the "legacy" entrypoint's
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# non-hermetic default.
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system = null;
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}
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);
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});
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checks.x86_64-linux.tarball = jobs.tarball;
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htmlDocs = {
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nixpkgsManual = jobs.manual;
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nixosManual = (import ./nixos/release-small.nix {
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nixpkgs = self;
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}).nixos.manual.x86_64-linux;
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};
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# The "legacy" in `legacyPackages` doesn't imply that the packages exposed
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# through this attribute are "legacy" packages. Instead, `legacyPackages`
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# is used here as a substitute attribute name for `packages`. The problem
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# with `packages` is that it makes operations like `nix flake show
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# nixpkgs` unusably slow due to the sheer number of packages the Nix CLI
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# needs to evaluate. But when the Nix CLI sees a `legacyPackages`
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# attribute it displays `omitted` instead of evaluating all packages,
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# which keeps `nix flake show` on Nixpkgs reasonably fast, though less
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# information rich.
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legacyPackages = forAllSystems (system:
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(import ./. { inherit system; }).extend self.overlays.setLibVersionInfo
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);
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nixosModules = {
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notDetected = ./nixos/modules/installer/scan/not-detected.nix;
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/*
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Make the `nixpkgs.*` configuration read-only. Guarantees that `pkgs`
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is the way you initialize it.
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Example:
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{
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imports = [ nixpkgs.nixosModules.readOnlyPkgs ];
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nixpkgs.pkgs = nixpkgs.legacyPackages.x86_64-linux;
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}
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*/
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readOnlyPkgs = ./nixos/modules/misc/nixpkgs/read-only.nix;
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};
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};
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}
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