deps - options

• deps

deps

All dependencies of the package. This option should be set by the “outer world” and can be used to inherit attributes from pkgs or inputs etc.

By separating the task of retrieving things from the outside world, it is ensured that the dependencies are overridable. Nothing will stop users from adding nixpkgs itself as a dependency, but this will make it very hard for the user of the package to override any dependencies, because they’d have to figure out a way to insert their changes into the Nixpkgs fixpoint. By adding specific attributes to deps instead, the user has a realistic chance of overriding those dependencies.

So deps should be specific, but not overly specific. For instance, the caller shouldn’t have to know the version of a dependency in order to override it. The name should suffice. (e.g. nix = nixVersions.nix_2_12 instead of inherit (nixVersions) nix_2_12.

Type: lazy attribute set of raw value

Default: { }

Example:

{nixpkgs, ...}: {
  inherit (nixpkgs) stdenv;
  inherit (nixpkgs.haskellPackages) pandoc;
}

Declared by:

• dream2nix/modules/dream2nix/core/deps