From 2ea6664124a7701035964f1477208aa9658256cd Mon Sep 17 00:00:00 2001
From: akhesaCaro <caroline.gaudreau@gmail.com>
Date: Tue, 7 Sep 2021 14:21:13 +0200
Subject: [PATCH] GHC9 mention in Nix README.

---
 nix/README.md | 1 +
 nix/shell.nix | 1 +
 2 files changed, 2 insertions(+)

diff --git a/nix/README.md b/nix/README.md
index 7514a6ad..f865a383 100644
--- a/nix/README.md
+++ b/nix/README.md
@@ -26,6 +26,7 @@ $ nix-shell nix/shell.nix --argstr compiler ghcHEAD
 -   `ghc865Binary`
 -   `ghc884`
 -   `ghc8104` - default
+-   `ghc901`
 
 ### Cabal users
 
diff --git a/nix/shell.nix b/nix/shell.nix
index ebe07722..715004f6 100644
--- a/nix/shell.nix
+++ b/nix/shell.nix
@@ -1,4 +1,5 @@
 let nixos = fetchTarball { url = "https://github.com/NixOS/nixpkgs/archive/refs/tags/21.05.tar.gz"; 
+                           sha256 = "sha256:1ckzhh24mgz6jd1xhfgx0i9mijk6xjqxwsshnvq789xsavrmsc36";
 }; in
 
 { compiler ? "ghc8104"