From 3369b350317f0be0b9b75846a84ef69463dfcdaa Mon Sep 17 00:00:00 2001
From: Dhruv Dang <hi@dhruv.io>
Date: Sun, 23 Aug 2020 22:21:24 -0700
Subject: [PATCH] #84563 #95931 fix ghcjs 8.6 so it builds

---
 .../development/compilers/ghcjs-ng/8.6/dep-overrides.nix | 9 ++++++---
 pkgs/development/compilers/ghcjs-ng/default.nix          | 3 +--
 .../haskell-modules/configuration-ghc-8.6.x.nix          | 8 ++++++++
 3 files changed, 15 insertions(+), 5 deletions(-)

diff --git a/pkgs/development/compilers/ghcjs-ng/8.6/dep-overrides.nix b/pkgs/development/compilers/ghcjs-ng/8.6/dep-overrides.nix
index c54c782fafa..c2f2cb3b81a 100644
--- a/pkgs/development/compilers/ghcjs-ng/8.6/dep-overrides.nix
+++ b/pkgs/development/compilers/ghcjs-ng/8.6/dep-overrides.nix
@@ -1,11 +1,14 @@
-{ haskellLib }:
+{ lib, haskellLib, fetchFromGitHub }:
 
-let inherit (haskellLib) doJailbreak dontHaddock;
+let inherit (haskellLib) doJailbreak dontHaddock dontCheck;
 in self: super: {
+  ghcjs = super.ghcjs.override {
+    shelly = super.shelly_1_8_1;
+  };
   ghc-api-ghcjs = super.ghc-api-ghcjs.override
   {
     happy = self.happy_1_19_5;
   };
-  haddock-library-ghcjs = doJailbreak super.haddock-library-ghcjs;
+  haddock-library-ghcjs = doJailbreak (dontCheck super.haddock-library-ghcjs);
   haddock-api-ghcjs = doJailbreak (dontHaddock super.haddock-api-ghcjs);
 }
diff --git a/pkgs/development/compilers/ghcjs-ng/default.nix b/pkgs/development/compilers/ghcjs-ng/default.nix
index 6d56c410aab..7b6fbc460a9 100644
--- a/pkgs/development/compilers/ghcjs-ng/default.nix
+++ b/pkgs/development/compilers/ghcjs-ng/default.nix
@@ -102,7 +102,6 @@ in stdenv.mkDerivation {
 
     inherit passthru;
 
-    meta.broken = true; # build does not succeed
-    meta.platforms = lib.platforms.none;  # passthru.bootPkgs.ghc.meta.platforms;
+    meta.platforms = passthru.bootPkgs.ghc.meta.platforms;
     meta.maintainers = [lib.maintainers.elvishjerricco];
   }
diff --git a/pkgs/development/haskell-modules/configuration-ghc-8.6.x.nix b/pkgs/development/haskell-modules/configuration-ghc-8.6.x.nix
index 339fda5d6fb..f68eec94200 100644
--- a/pkgs/development/haskell-modules/configuration-ghc-8.6.x.nix
+++ b/pkgs/development/haskell-modules/configuration-ghc-8.6.x.nix
@@ -94,4 +94,12 @@ self: super: {
 
   # Only 0.6 is compatible with ghc 8.6 https://hackage.haskell.org/package/apply-refact/changelog
   apply-refact = super.apply-refact_0_6_0_0;
+
+  # ghcjs 8.6.x relies on shelly < 1.9.0 (default is 1.9.0 in current package set, adding 1.8.1).
+  shelly_1_8_1 = super.callCabal2nix "shelly" (pkgs.fetchFromGitHub {
+    owner = "gregwebs";
+    repo = "Shelly.hs";
+    rev = "d0a185c7dee96820fc3652e7603d81a28276d76c";
+    sha256 = "173msjlq6yxpvd3900ajmd8znyg9kfg5csbxbiz4m7hvxkg8kbkn";
+  }) {};
 }