From e833809a9284257cc86b5f8b40a3cfb8ced22b0b Mon Sep 17 00:00:00 2001
From: code5hot <32754917+code5hot@users.noreply.github.com>
Date: Sun, 25 Aug 2019 23:49:11 +0100
Subject: [PATCH] use debian testing repo in addition to being the base system

use debian testing repo in addition to being the base system. The testing system of today has the required version of happy, but "stretch" doesn't
---
 Dockerfile | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Dockerfile b/Dockerfile
index 1760860..094c9a1 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -27,7 +27,7 @@ RUN apt-get update && apt-get install -y \
 # from darinmorrison/haskell
 # from http://downloads.haskell.org/debian/
 RUN  apt-key adv --keyserver hkp://keyserver.ubuntu.com:80  --recv-keys BA3CBA3FFE22B574 \
-  && echo 'deb     http://downloads.haskell.org/debian stretch main' >> /etc/apt/sources.list.d/haskell.list
+  && echo 'deb     http://downloads.haskell.org/debian testing main' >> /etc/apt/sources.list.d/haskell.list
 
 RUN apt-get update && apt-get install -y \