From 29e029da1c568aacdbe94409314263f6bb568f71 Mon Sep 17 00:00:00 2001
From: sternenseemann <0rpkxez4ksa01gb3typccl0i@systemli.org>
Date: Mon, 17 May 2021 22:08:56 +0200
Subject: [PATCH] haskell.compiler.ghcHEAD: bootstrap using GHC 9.0

They use matching LLVM versions which should alleviate some warnings.
---
 pkgs/top-level/haskell-packages.nix | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/pkgs/top-level/haskell-packages.nix b/pkgs/top-level/haskell-packages.nix
index af4125d6713..8bea40efe64 100644
--- a/pkgs/top-level/haskell-packages.nix
+++ b/pkgs/top-level/haskell-packages.nix
@@ -86,7 +86,7 @@ in {
       llvmPackages = pkgs.llvmPackages_10;
     };
     ghcHEAD = callPackage ../development/compilers/ghc/head.nix {
-      bootPkgs = packages.ghc8104; # no binary yet
+      bootPkgs = packages.ghc901; # no binary yet
       inherit (buildPackages.python3Packages) sphinx;
       buildLlvmPackages = buildPackages.llvmPackages_10;
       llvmPackages = pkgs.llvmPackages_10;