configuration.md

Configuration

In this section we describe the blueprint configuration options.

Those are available by changing the flake.nix output invocation with additional parameters.

prefix

Set this if you want to load the blueprint from a directory within the repositiry other than the flake location.

Default: "."

Type: string.

systems

Defines for which systems the project should be used and deployed on.

Default: it will load the inputs.systems flake input, first from the current flake, and then fallback to the blueprint one. (see https://github.com/nix-systems/default).

Type: list of <kernel>-<arch> strings.

Example:

{
  outputs = inputs: inputs.blueprint {
    inherit inputs;
    systems = [ "aarch64-linux" "x86_64-linux" ];
  };
}

nixpkgs.config

If set, blueprint will create a new instance of nixpkgs for each systems, with the passed config.

Default: inputs.nixpkgs.legacyPackages.<system>.

Type: attrset.

Example:

{
  outputs = inputs: inputs.blueprint {
    inherit inputs;
    nixpkgs.config.allowUnfree = true;
  };
}

nixpkgs.overlays

NOTE: It's better to use perSystem composition style instead of overlays if you can.

If set, blueprint will create a new instance of nixpkgs for each systems, with the passed config.

Default: inputs.nixpkgs.legacyPackages.<system>.

Type: list of functions.

Example:

{
  outputs = inputs: inputs.blueprint {
    inherit inputs;
    nixpkgs.overlays = [
      inputs.otherflake.overlays.default
      (final: prev: {
        git = final.gitMinimal;
      })
    ];
  };
}