From 3d7b19344d8e3c81ac5f23af776f09ec88962099 Mon Sep 17 00:00:00 2001
From: Simon Chatterjee <code@chatts.net>
Date: Mon, 17 Feb 2020 17:45:05 +0000
Subject: [PATCH] haskell-cabal-fmt: override Cabal to version 3.0.x

---
 pkgs/development/haskell-modules/configuration-common.nix      | 3 +++
 .../development/haskell-modules/configuration-hackage2nix.yaml | 1 -
 2 files changed, 3 insertions(+), 1 deletion(-)

diff --git a/pkgs/development/haskell-modules/configuration-common.nix b/pkgs/development/haskell-modules/configuration-common.nix
index 47b030d77cf..13ce36eff06 100644
--- a/pkgs/development/haskell-modules/configuration-common.nix
+++ b/pkgs/development/haskell-modules/configuration-common.nix
@@ -1403,4 +1403,7 @@ self: super: {
     '';
   });
 
+  # cabal-fmt requires Cabal3
+  cabal-fmt = super.cabal-fmt.override { Cabal = self.Cabal_3_0_0_0; };
+
 } // import ./configuration-tensorflow.nix {inherit pkgs haskellLib;} self super
diff --git a/pkgs/development/haskell-modules/configuration-hackage2nix.yaml b/pkgs/development/haskell-modules/configuration-hackage2nix.yaml
index f69e068d637..a25977eff3b 100644
--- a/pkgs/development/haskell-modules/configuration-hackage2nix.yaml
+++ b/pkgs/development/haskell-modules/configuration-hackage2nix.yaml
@@ -3328,7 +3328,6 @@ broken-packages:
   - cabal-dev
   - cabal-dir
   - cabal-flatpak
-  - cabal-fmt
   - cabal-ghc-dynflags
   - cabal-ghci
   - cabal-graphdeps