From d83a46b61ff87d8f3e220b7e745525a70794ca8c Mon Sep 17 00:00:00 2001
From: adisbladis <adisbladis@gmail.com>
Date: Thu, 26 May 2022 18:22:53 +0800
Subject: [PATCH] shell.nix: Use pinned nixpkgs from flake.lock

---
 shell.nix | 22 +++++++++++++++++-----
 1 file changed, 17 insertions(+), 5 deletions(-)

diff --git a/shell.nix b/shell.nix
index 6d64c55..b984a47 100644
--- a/shell.nix
+++ b/shell.nix
@@ -1,9 +1,21 @@
-{ pkgs ? import <nixpkgs> {
-    overlays = [
-      (import ./overlay.nix)
-    ];
-  }
+{ pkgs ? (
+    let
+      inherit (builtins) fromJSON readFile;
+      flakeLock = fromJSON (readFile ./flake.lock);
+      locked = flakeLock.nodes.nixpkgs.locked;
+      nixpkgs = assert locked.type == "github"; builtins.fetchTarball {
+        url = "https://github.com/${locked.owner}/${locked.repo}/archive/${locked.rev}.tar.gz";
+        sha256 = locked.narHash;
+      };
+    in
+    import nixpkgs {
+      overlays = [
+        (import ./overlay.nix)
+      ];
+    }
+  )
 }:
+
 let
   pythonEnv = pkgs.python3.withPackages (_: [ ]);