From 5fcda75017fc78fdb562c941ffb51710e7fb0afd Mon Sep 17 00:00:00 2001
From: sternenseemann <sternenseemann@systemli.org>
Date: Sun, 5 Dec 2021 14:02:30 +0100
Subject: [PATCH] haskell.packages.ghc901.{multistate,butcher}: jailbreak

These packages build fine with GHC 9.0.1, but forbid base 4.15. Build
fixed as a prerequisite to later unbreaking brittany.
---
 .../development/haskell-modules/configuration-ghc-9.0.x.nix | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/pkgs/development/haskell-modules/configuration-ghc-9.0.x.nix b/pkgs/development/haskell-modules/configuration-ghc-9.0.x.nix
index 8670285918f2..b46d06efddc7 100644
--- a/pkgs/development/haskell-modules/configuration-ghc-9.0.x.nix
+++ b/pkgs/development/haskell-modules/configuration-ghc-9.0.x.nix
@@ -152,6 +152,12 @@ self: super: {
   # Restrictive upper bound on ormolu
   hls-ormolu-plugin = doJailbreak super.hls-ormolu-plugin;
 
+  # Too strict bounds on base
+  # https://github.com/lspitzner/multistate/issues/9
+  multistate = doJailbreak super.multistate;
+  # https://github.com/lspitzner/butcher/issues/7
+  butcher = doJailbreak super.butcher;
+
   # 2021-09-18: The following plugins don‘t work yet on ghc9.
   haskell-language-server = appendConfigureFlags [
     "-f-tactic"