From f39f5cf4bb5c762e7d6ff07b6b6f35a3e8f74a65 Mon Sep 17 00:00:00 2001
From: Peter Simons <simons@cryp.to>
Date: Fri, 16 Oct 2020 22:37:09 +0200
Subject: [PATCH] ghc-9.0.x: add plenty of overrides to make packages build

---
 .../configuration-ghc-9.0.x.nix               | 40 +++++++++++++++++++
 .../haskell-modules/configuration-nix.nix     |  1 +
 2 files changed, 41 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 2a3a0b3bc143..fdb5af4a854c 100644
--- a/pkgs/development/haskell-modules/configuration-ghc-9.0.x.nix
+++ b/pkgs/development/haskell-modules/configuration-ghc-9.0.x.nix
@@ -43,4 +43,44 @@ self: super: {
   unix = null;
   xhtml = null;
 
+  # Take the 3.4.x release candidate.
+  cabal-install = assert super.cabal-install.version == "3.2.0.0";
+                  overrideCabal super.cabal-install (drv: {
+    postUnpack = "sourceRoot+=/cabal-install; echo source root reset to $sourceRoot";
+    version = "cabal-install-3.4.0.0-rc4";
+    editedCabalFile = null;
+    src = pkgs.fetchgit {
+      url = "git://github.com/haskell/cabal.git";
+      rev = "cabal-install-3.4.0.0-rc4";
+      sha256 = "049hllk1d8jid9yg70hmcsdgb0n7hm24p39vavllaahfb0qfimrk";
+    };
+  });
+
+  # Jailbreaks!
+  dec = doJailbreak super.dec;
+  ed25519 = doJailbreak super.ed25519;
+  integer-logarithms = overrideCabal (doJailbreak super.integer-logarithms) (drv: { postPatch = "sed -i -e 's,integer-gmp <1.1,integer-gmp < 2,' integer-logarithms.cabal"; });
+  parallel = doJailbreak super.parallel;
+  primitive = doJailbreak super.primitive_0_7_1_0;
+  regex-posix = doJailbreak super.regex-posix;
+  singleton-bool = doJailbreak super.singleton-bool;
+  tar = doJailbreak super.tar;
+  th-abstraction = self.th-abstraction_0_4_0_0;
+  zlib = doJailbreak super.zlib;
+  splitmix = doJailbreak super.splitmix;
+
+  # Apply patches from head.hackage.
+  language-haskell-extract = appendPatch (doJailbreak super.language-haskell-extract) (pkgs.fetchpatch {
+    url = "https://gitlab.haskell.org/ghc/head.hackage/-/raw/master/patches/language-haskell-extract-0.2.4.patch";
+    sha256 = "0rgzrq0513nlc1vw7nw4km4bcwn4ivxcgi33jly4a7n3c1r32v1f";
+  });
+  regex-base = appendPatch (doJailbreak super.regex-base) (pkgs.fetchpatch {
+    url = "https://gitlab.haskell.org/ghc/head.hackage/-/raw/master/patches/regex-base-0.94.0.0.patch";
+    sha256 = "0k5fglbl7nnhn8400c4cpnflxcbj9p3xi5prl9jfmszr31jwdy5d";
+  });
+  syb = appendPatch (dontCheck super.syb) (pkgs.fetchpatch {
+    url = "https://gitlab.haskell.org/ghc/head.hackage/-/raw/master/patches/syb-0.7.1.patch";
+    sha256 = "1407r8xv6bfnmpbw7glfh4smi76a2fc9pkq300c3d9f575708zqr";
+  });
+
 }
diff --git a/pkgs/development/haskell-modules/configuration-nix.nix b/pkgs/development/haskell-modules/configuration-nix.nix
index 2158386629aa..d1968f489aef 100644
--- a/pkgs/development/haskell-modules/configuration-nix.nix
+++ b/pkgs/development/haskell-modules/configuration-nix.nix
@@ -730,6 +730,7 @@ self: super: builtins.intersectAttrs super {
 
   # break infinite recursion with base-orphans
   primitive = dontCheck super.primitive;
+  primitive_0_7_1_0 = dontCheck super.primitive_0_7_1_0;
 
   cut-the-crap =
     let path = pkgs.stdenv.lib.makeBinPath [ pkgs.ffmpeg_3 pkgs.youtube-dl ];