From 18fa78c539a1ce1b9e57a1c87ccb3c5d293eec1b Mon Sep 17 00:00:00 2001
From: Kosyrev Serge <serge.kosyrev@iohk.io>
Date: Sun, 25 Feb 2018 07:38:19 +0300
Subject: [PATCH] ghc841 | tar:  upstream fix not on Hackage yet

---
 .../haskell-modules/configuration-ghc-8.4.x.nix     | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/pkgs/development/haskell-modules/configuration-ghc-8.4.x.nix b/pkgs/development/haskell-modules/configuration-ghc-8.4.x.nix
index e98e50c7bce..6def68bd2a2 100644
--- a/pkgs/development/haskell-modules/configuration-ghc-8.4.x.nix
+++ b/pkgs/development/haskell-modules/configuration-ghc-8.4.x.nix
@@ -282,6 +282,19 @@ self: super: {
     };
   });
 
+  ## Upstreamed, awaiting a Hackage release
+  tar = overrideCabal super.tar (drv: {
+    ##     • No instance for (Semigroup (Entries e))
+    ##         arising from the superclasses of an instance declaration
+    ##     • In the instance declaration for ‘Monoid (Entries e)’
+    src = pkgs.fetchFromGitHub {
+      owner  = "haskell";
+      repo   = "tar";
+      rev    = "abf2ccb8f7da0514343a0b2624cabebe081bdfa8";
+      sha256 = "0s33lgrr574i1r7zc1jqahnwx3dv47ny30mbx5zfpdzjw0jdl5ny";
+    };
+  });
+
   ## Upstreamed, awaiting a Hackage release
   th-desugar = overrideCabal super.th-desugar (drv: {
     ##     • Could not deduce (MonadIO (DsM q))