From b872b8a2009d68636fce8e4078dc9e65a70547fe Mon Sep 17 00:00:00 2001
From: Joachim Breitner <mail@joachim-breitner.de>
Date: Sun, 29 Mar 2020 18:52:41 +0200
Subject: [PATCH 1/2] ghc-8.4.4.nix: Do not use git.haskell.org
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which was deprecated in 2018 and is now gone for good. I guess many
won’t notice because the nix-cache kept the files around?

This fetches the patches from github. Unfortunately it seems that the
sha256 hashes (calculated with `nix-prefetch-url`) have been modified.

Alternatively, if someone has the old patches around they could arguably
be added to `tarballs.nixos.org` (it seems they are not there right
now).
---
 pkgs/development/compilers/ghc/8.4.4.nix | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/pkgs/development/compilers/ghc/8.4.4.nix b/pkgs/development/compilers/ghc/8.4.4.nix
index 4bebd63956e7..5dda307e32b8 100644
--- a/pkgs/development/compilers/ghc/8.4.4.nix
+++ b/pkgs/development/compilers/ghc/8.4.4.nix
@@ -96,8 +96,8 @@ stdenv.mkDerivation (rec {
   outputs = [ "out" "doc" ];
 
   patches = [(fetchpatch {
-    url = "https://git.haskell.org/hsc2hs.git/patch/738f3666c878ee9e79c3d5e819ef8b3460288edf";
-    sha256 = "0plzsbfaq6vb1023lsarrjglwgr9chld4q3m99rcfzx0yx5mibp3";
+    url = "https://github.com/haskell/hsc2hs/commit/738f3666c878ee9e79c3d5e819ef8b3460288edf.patch";
+    sha256 = "1q3rg7lka5czsryzj2nfr3f2iy2zw87kfd54hc4dlxz79z3vwz8p";
     extraPrefix = "utils/hsc2hs/";
     stripLen = 1;
   }) (fetchpatch rec { # https://phabricator.haskell.org/D5123
@@ -112,8 +112,8 @@ stdenv.mkDerivation (rec {
     })
     ++ stdenv.lib.optional stdenv.isDarwin ./backport-dylib-command-size-limit.patch
     ++ stdenv.lib.optional (targetPlatform.isAarch32 || targetPlatform.isAarch64) (fetchpatch {
-      url = "https://git.haskell.org/ghc.git/patch/d8495549ba9d194815c2d0eaee6797fc7c00756a";
-      sha256 = "1yjcma507c609bcim4rnxq0gaj2dg4d001jklmbpbqpzqzxkn5sz";
+      url = "https://github.com/ghc/ghc/commit/d8495549ba9d194815c2d0eaee6797fc7c00756a.patch";
+      sha256 = "0ck3a26bvy6w3jy2x19zgixpfs3ig1ycdnq08xia1dd8gik9hjgf";
     });
 
   postPatch = "patchShebangs .";

From 29ca177c684cb42f0ea57171be5653b9b5060ba7 Mon Sep 17 00:00:00 2001
From: Joachim Breitner <mail@joachim-breitner.de>
Date: Sun, 29 Mar 2020 21:07:48 +0200
Subject: [PATCH 2/2] Use .diff, not .patch, and fix sha hashes

---
 pkgs/development/compilers/ghc/8.4.4.nix | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/pkgs/development/compilers/ghc/8.4.4.nix b/pkgs/development/compilers/ghc/8.4.4.nix
index 5dda307e32b8..57d6a108de09 100644
--- a/pkgs/development/compilers/ghc/8.4.4.nix
+++ b/pkgs/development/compilers/ghc/8.4.4.nix
@@ -96,8 +96,8 @@ stdenv.mkDerivation (rec {
   outputs = [ "out" "doc" ];
 
   patches = [(fetchpatch {
-    url = "https://github.com/haskell/hsc2hs/commit/738f3666c878ee9e79c3d5e819ef8b3460288edf.patch";
-    sha256 = "1q3rg7lka5czsryzj2nfr3f2iy2zw87kfd54hc4dlxz79z3vwz8p";
+    url = "https://github.com/haskell/hsc2hs/commit/738f3666c878ee9e79c3d5e819ef8b3460288edf.diff";
+    sha256 = "0plzsbfaq6vb1023lsarrjglwgr9chld4q3m99rcfzx0yx5mibp3";
     extraPrefix = "utils/hsc2hs/";
     stripLen = 1;
   }) (fetchpatch rec { # https://phabricator.haskell.org/D5123
@@ -112,8 +112,8 @@ stdenv.mkDerivation (rec {
     })
     ++ stdenv.lib.optional stdenv.isDarwin ./backport-dylib-command-size-limit.patch
     ++ stdenv.lib.optional (targetPlatform.isAarch32 || targetPlatform.isAarch64) (fetchpatch {
-      url = "https://github.com/ghc/ghc/commit/d8495549ba9d194815c2d0eaee6797fc7c00756a.patch";
-      sha256 = "0ck3a26bvy6w3jy2x19zgixpfs3ig1ycdnq08xia1dd8gik9hjgf";
+      url = "https://github.com/ghc/ghc/commit/d8495549ba9d194815c2d0eaee6797fc7c00756a.diff";
+      sha256 = "1yjcma507c609bcim4rnxq0gaj2dg4d001jklmbpbqpzqzxkn5sz";
     });
 
   postPatch = "patchShebangs .";