From 9b9e49e8e475e8fdef7866306e43451a0be26438 Mon Sep 17 00:00:00 2001
From: Robert Hensing <robert@roberthensing.nl>
Date: Thu, 24 Apr 2025 02:16:02 +0200
Subject: [PATCH] overlays.default: Only set `nix`

We should keep users' pkgs tidy.
---
 flake.nix | 18 +++++++++++++++---
 1 file changed, 15 insertions(+), 3 deletions(-)

diff --git a/flake.nix b/flake.nix
index 81ce57c68..2b93429e9 100644
--- a/flake.nix
+++ b/flake.nix
@@ -289,9 +289,21 @@
 
     in
     {
-      # A Nixpkgs overlay that overrides the 'nix' and
-      # 'nix-perl-bindings' packages.
-      overlays.default = overlayFor (p: p.stdenv);
+      overlays.internal = overlayFor (p: p.stdenv);
+
+      /**
+        A Nixpkgs overlay that sets `nix` to something like `packages.<system>.nix-everything`,
+        except dependencies aren't taken from (flake) `nix.inputs.nixpkgs`, but from the Nixpkgs packages
+        where the overlay is used.
+      */
+      overlays.default =
+        final: prev:
+        let
+          packageSets = packageSetsFor { pkgs = final; };
+        in
+        {
+          nix = packageSets.nixComponents.nix-everything;
+        };
 
       hydraJobs = import ./packaging/hydra.nix {
         inherit