From 5a1a30becc091c3d01d22e7712d26278470df3b5 Mon Sep 17 00:00:00 2001
From: Peter Simons <simons@cryp.to>
Date: Thu, 15 Mar 2018 21:12:58 +0100
Subject: [PATCH] structured-haskell-mode: update overrides for lts-11.x

---
 pkgs/development/haskell-modules/configuration-common.nix | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/pkgs/development/haskell-modules/configuration-common.nix b/pkgs/development/haskell-modules/configuration-common.nix
index 0496383da2f..cff41f865a7 100644
--- a/pkgs/development/haskell-modules/configuration-common.nix
+++ b/pkgs/development/haskell-modules/configuration-common.nix
@@ -601,7 +601,9 @@ self: super: {
       mkdir -p $data/share/emacs
       ln -s $lispdir $data/share/emacs/site-lisp
     '';
-  }));
+  })).override {
+    haskell-src-exts = self.haskell-src-exts_1_19_1;
+  };
 
   # Make elisp files available at a location where people expect it.
   hindent = (overrideCabal super.hindent (drv: {