nix-starter-configs/multi-nixpkgs/overlays/default.nix

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{ inputs, ... }:
# This file defines overlays
{
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# Sets `unstable` under `pkgs` as the nixpkgs unstable channel
unstable = final: _prev: {
unstable = inputs.nixpkgs-unstable.legacyPackages.${final.system};
};
# This one brings our custom packages from the 'pkgs' directory
additions = final: _prev: import ../pkgs { pkgs = final; };
# This one contains whatever you want to overlay
# You can change versions, add patches, set compilation flags, anything really.
# https://nixos.wiki/wiki/Overlays
modifications = final: prev: {
# example = prev.example.overrideAttrs (oldAttrs: rec {
# ...
# });
};
}