ghc-8.2.1-cabal.patch

diff --git a/pkgs/development/haskell-modules/configuration-ghc-8.2.x.nix b/pkgs/development/haskell-modules/configuration-ghc-8.2.x.nix
index d1e22d881c..3383a80d51 100644
--- a/pkgs/development/haskell-modules/configuration-ghc-8.2.x.nix
+++ b/pkgs/development/haskell-modules/configuration-ghc-8.2.x.nix
@@ -1,4 +1,4 @@
-{ pkgs, haskellLib }:
+{ pkgs, stdenv, fetchurl, haskellLib }:
 
 with haskellLib;
 
@@ -37,7 +37,48 @@ self: super: {
   xhtml = null;
 
   # cabal-install can use the native Cabal library.
-  cabal-install = super.cabal-install.override { Cabal = null; };
+  # cabal-install = super.cabal-install.override { Cabal = null; };
+
+  cabal-install = self.callPackage
+    ({ mkDerivation, array, async, base, base16-bytestring, binary
+     , bytestring, Cabal, containers, cryptohash-sha256, directory
+     , filepath, hackage-security, hashable, HTTP, mtl, network
+     , network-uri, pretty, process, QuickCheck, random, regex-posix
+     , stm, tagged, tar, tasty, tasty-hunit, tasty-quickcheck, time
+     , unix, zlib
+     }:
+     mkDerivation {
+       pname = "cabal-install";
+       version = "2.0.0.0";
+       isLibrary = false;
+       isExecutable = true;
+       executableHaskellDepends = [
+         array async base base16-bytestring binary bytestring Cabal
+         containers cryptohash-sha256 directory filepath hackage-security
+         hashable HTTP mtl network network-uri pretty process random stm tar
+         time unix zlib
+       ];
+       testHaskellDepends = [
+         array async base binary bytestring Cabal containers directory
+         filepath hackage-security hashable HTTP mtl network network-uri
+         pretty process QuickCheck random regex-posix stm tagged tar tasty
+         tasty-hunit tasty-quickcheck time unix zlib
+       ];
+       doCheck = false;
+       postInstall = ''
+         mkdir $out/etc
+         mv bash-completion $out/etc/bash_completion.d
+       '';
+       homepage = "http://www.haskell.org/cabal/";
+       description = "The command-line interface for Cabal and Hackage";
+       license = stdenv.lib.licenses.bsd3;
+       maintainers = with stdenv.lib.maintainers; [ peti ];
+
+       src = self.ghc.src;
+       postUnpack = ''
+         sourceRoot=$sourceRoot/libraries/Cabal/cabal-install
+       '';
+     }) { Cabal = null; };
 
   # jailbreak-cabal doesn't seem to work right with the native Cabal version.
   jailbreak-cabal = pkgs.haskell.packages.ghc802.jailbreak-cabal;
@@ -63,4 +104,7 @@ self: super: {
   ChasingBottoms = doJailbreak super.ChasingBottoms;
   hashable = doJailbreak super.hashable;
 
+  # FIXME?
+  hackage-security = doJailbreak super.hackage-security;
+
 }