From 89fe6aff28d336602258e5872c0ef8a948bd0990 Mon Sep 17 00:00:00 2001
From: Alexander Bantyev <balsoft@balsoft.ru>
Date: Thu, 1 Sep 2022 18:23:59 +0400
Subject: [PATCH] Pin flake-registry so that it's not fetched every time

---
 flake.lock               | 17 +++++++++++++++++
 flake.nix                |  5 +++++
 profiles/nix/default.nix |  3 +++
 3 files changed, 25 insertions(+)

diff --git a/flake.lock b/flake.lock
index 33d612b..6d193f7 100644
--- a/flake.lock
+++ b/flake.lock
@@ -217,6 +217,22 @@
         "type": "github"
       }
     },
+    "flake-registry": {
+      "flake": false,
+      "locked": {
+        "lastModified": 1661161594,
+        "narHash": "sha256-tu1KKNLw+v7ZOIUPGDE66tn9vEyhIAWiiJYZRGGev8E=",
+        "owner": "nixos",
+        "repo": "flake-registry",
+        "rev": "8634fb4e1db6c76ce037bc00ef80f9ebd2616476",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nixos",
+        "repo": "flake-registry",
+        "type": "github"
+      }
+    },
     "flake-utils": {
       "locked": {
         "lastModified": 1656928814,
@@ -716,6 +732,7 @@
         "deploy-rs": "deploy-rs",
         "direnv-vscode": "direnv-vscode",
         "flake-compat": "flake-compat_3",
+        "flake-registry": "flake-registry",
         "himalaya": "himalaya",
         "home-manager": "home-manager",
         "impermanence": "impermanence",
diff --git a/flake.nix b/flake.nix
index f864439..30b7dcc 100644
--- a/flake.nix
+++ b/flake.nix
@@ -89,6 +89,11 @@
       url = "github:gpoore/codebraid";
       flake = false;
     };
+
+    flake-registry = {
+      url = "github:nixos/flake-registry";
+      flake = false;
+    };
   };
 
   outputs = { nixpkgs, self, nix, deploy-rs, ... }@inputs:
diff --git a/profiles/nix/default.nix b/profiles/nix/default.nix
index d3a8b9b..18d6b45 100644
--- a/profiles/nix/default.nix
+++ b/profiles/nix/default.nix
@@ -10,7 +10,10 @@
 
     extraOptions = ''
       builders-use-substitutes = true
+      # Enable flakes
       experimental-features = nix-command flakes
+      # Prevent Nix from fetching the registry every time
+      flake-registry = ${inputs.flake-registry}/flake-registry.json
     '';
 
     settings = {