From 689788568599dedbc109d137929de866ed17f667 Mon Sep 17 00:00:00 2001
From: erikarvstedt <36110478+erikarvstedt@users.noreply.github.com>
Date: Thu, 28 Oct 2021 15:04:19 +0200
Subject: [PATCH] Pin nixpkgs to a working revision. With the latest stable
 channel `nixos-21.05`, test `behavior.saturating_arithmetic.test "saturating
 multiplication"` fails.

---
 Development-with-nix.md | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/Development-with-nix.md b/Development-with-nix.md
index 7e707c2..47274f1 100644
--- a/Development-with-nix.md
+++ b/Development-with-nix.md
@@ -1,6 +1,13 @@
 Here is a sample shell.nix for building/developing zig.
 ```nix
-{ pkgs ? import <nixpkgs> { } }:
+let
+  nixpkgs = builtins.fetchTarball {
+    # nixpkgs-unstable (2021-10-28)
+    url = "https://github.com/NixOS/nixpkgs/archive/22a500a3f87bbce73bd8d777ef920b43a636f018.tar.gz";
+    sha256 = "1rqp9nf45m03mfh4x972whw2gsaz5x44l3dy6p639ib565g24rmh";
+  };
+in
+{ pkgs ? import nixpkgs { } }:
 
 pkgs.mkShell {
   hardeningDisable = [ "all" ];