From cc61d6cca06aaa46ccde79a92cd94dbb27c634a7 Mon Sep 17 00:00:00 2001
From: sternenseemann <sternenseemann@systemli.org>
Date: Tue, 9 Nov 2021 13:25:03 +0100
Subject: [PATCH] haskellPackages.ghc-bignum: pin to 1.0 for 8.10.* support

Starting with GHC 9.0.1 ghc-bignum is bundled with GHC and we don't need
to worry about building it from hackage. ghc-bignum 1.2 doesn't seem to
build with anything before 9.2.1, so we need to downgrade ghc-bignum to
1.0 (and sadly keep our patches) for 8.10.7 support.
---
 .../configuration-hackage2nix/main.yaml               |  2 ++
 pkgs/development/haskell-modules/hackage-packages.nix | 11 +++++++++++
 2 files changed, 13 insertions(+)

diff --git a/pkgs/development/haskell-modules/configuration-hackage2nix/main.yaml b/pkgs/development/haskell-modules/configuration-hackage2nix/main.yaml
index 963426fd8af3..d44340db9e1b 100644
--- a/pkgs/development/haskell-modules/configuration-hackage2nix/main.yaml
+++ b/pkgs/development/haskell-modules/configuration-hackage2nix/main.yaml
@@ -96,6 +96,8 @@ default-package-overrides:
   - SVGFonts < 1.8
   # 2021-11-09: 0.20.6 can't be built with aeson < 2.0 which is a pain to override at the moment
   - futhark < 0.20.6
+  # 2021-11-09: ghc-bignum is bundled starting with 9.0.1; only 1.0 builds with GHCs prior to 9.2.1
+  - ghc-bignum == 1.0
 
 extra-packages:
   - base16-bytestring < 1               # required for cabal-install etc.
diff --git a/pkgs/development/haskell-modules/hackage-packages.nix b/pkgs/development/haskell-modules/hackage-packages.nix
index 5b4a0ddc231c..f1d57449473d 100644
--- a/pkgs/development/haskell-modules/hackage-packages.nix
+++ b/pkgs/development/haskell-modules/hackage-packages.nix
@@ -103415,6 +103415,16 @@ self: {
      }) {};
 
   "ghc-bignum" = callPackage
+    ({ mkDerivation }:
+     mkDerivation {
+       pname = "ghc-bignum";
+       version = "1.0";
+       sha256 = "0xl848q8z6qx2bi6xil0d35lra7wshwvysyfblki659d7272b1im";
+       description = "GHC BigNum library";
+       license = lib.licenses.bsd3;
+     }) {};
+
+  "ghc-bignum_1_2" = callPackage
     ({ mkDerivation }:
      mkDerivation {
        pname = "ghc-bignum";
@@ -103422,6 +103432,7 @@ self: {
        sha256 = "0ldg53hirqz6yszacpajq6pf407bflyk46wjhx5g8n2cjz54vv3p";
        description = "GHC BigNum library";
        license = lib.licenses.bsd3;
+       hydraPlatforms = lib.platforms.none;
      }) {};
 
   "ghc-bignum-orphans" = callPackage