Use xenial dist for linux

diff --git a/.travis.yml b/.travis.yml
index acea78cbd644c4e88a900cba9b77453ee2d79195..adbb59f2fca381c63a18de131154179b643d3a52 100644 (file)
--- a/.travis.yml
+++ b/.travis.yml
@@ -7,6 +7,8 @@ os:
 - linux
 - osx
 
+dist: xenial
+
 cache:
   directories:
     - .stack-work
@@ -21,7 +23,6 @@ addons:
     packages:
       - haskell-stack
       - npm
-    update: true
   homebrew:
     packages:
       - haskell-stack