From 6e2537341e1ef36be5e1c3f04d48f661c7264315 Mon Sep 17 00:00:00 2001
From: clerie <git@clerie.de>
Date: Fri, 19 May 2023 10:06:47 +0200
Subject: [PATCH] configuration/common: pin nixpkgs to host version for nix
 commands

---
 configuration/common/default.nix | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/configuration/common/default.nix b/configuration/common/default.nix
index 0e25af1..01addc8 100644
--- a/configuration/common/default.nix
+++ b/configuration/common/default.nix
@@ -113,6 +113,23 @@
     ];
   };
 
+  # Pin current nixpkgs channel and flake registry to the nixpkgs version
+  # the host got build with
+  nix.nixPath = lib.mkForce [ "nixpkgs=${lib.cleanSource pkgs.path}" ];
+  nix.registry = {
+    "nixpkgs" = {
+       from = {
+         type = "indirect";
+         id = "nixpkgs";
+       };
+       to = {
+         type = "path";
+         path = lib.cleanSource pkgs.path;
+       };
+       exact = true;
+    };
+  };
+
   services.fstrim.enable = true;
 
   clerie.nixfiles.enable = true;