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# This file imports the pinned nixpkgs sets and applies relevant
# modifications, such as our overlays.
#
# Note that the attribute exposed by this (third_party.nixpkgs) is
# "special" in that the fixpoint used as readTree's config parameter
# in //default.nix passes this attribute as the `pkgs` argument to all
# readTree derivations.
{ depot, externalArgs, ... }:
let
# This provides the sources of nixpkgs. We track both
# nixos-unstable, and the current stable channel of the latest NixOS
# release.
# Tracking nixos-unstable as of 2021-08-11.
unstableHashes = {
commit = "fe01052444c1d66ed6ef76df2af798c9769e9e79";
sha256 = "0z99hwxgrvlf0psicwd97kdqqcc3qngfzmcz7k68q6q868y8582y";
};
# Tracking nixos-21.05 as of 2021-08-11.
stableHashes = {
commit = "2d6ab6c6b92f7aaf8bc53baba9754b9bfdce56f2";
sha256 = "1aafqly1mcqxh0r15mrlsrs4znldhm7cizsmfp3d25lqssay6gjd";
};
# import the nixos-unstable package set, or optionally use the
# source (e.g. a path) specified by the `nixpkgsBisectPath`
# argument. This is intended for use-cases where the depot is
# bisected against nixpkgs to find the root cause of an issue in a
# channel bump.
nixpkgsSrc = externalArgs.nixpkgsBisectPath or (fetchTarball {
url = "https://github.com/NixOS/nixpkgs/archive/${unstableHashes.commit}.tar.gz";
sha256 = unstableHashes.sha256;
});
stableNixpkgsSrc = fetchTarball {
url = "https://github.com/NixOS/nixpkgs/archive/${stableHashes.commit}.tar.gz";
sha256 = stableHashes.sha256;
};
# Stable package set is imported, but not exposed, to overlay
# required packages into the unstable set.
stableNixpkgs = import stableNixpkgsSrc {};
# Overlay for packages that should come from the stable channel
# instead (e.g. because something is broken in unstable).
stableOverlay = self: super: {
# nothing picked from stable currently
};
in import nixpkgsSrc {
config.allowUnfree = true;
config.allowBroken = true;
overlays = [
stableOverlay
depot.third_party.overlays.tvl
depot.third_party.overlays.haskell
depot.third_party.overlays.emacs
];
}
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