Use cabal nightly on windows

diff --git a/.travis.yml b/.travis.yml
index 8a6fd8040dc237f0f5f6d54de70af8412d7ee6c5..d4fe4c166438593feb4b687c03058a8f7fd9764c 100644 (file)
--- a/.travis.yml
+++ b/.travis.yml
@@ -37,7 +37,8 @@ addons:
 before_install:
 - |
   if [[ "$TRAVIS_OS_NAME" == "windows" ]]; then
-    choco install ghc cabal nodejs
+    choco install cabal -pre
+    choco install ghc nodejs
     /C/ProgramData/chocolatey/bin/RefreshEnv.cmd
     export PATH=/C/ProgramData/chocolatey/lib/ghc/tools/ghc-8.6.5/bin:${PATH}
     /C/ProgramData/chocolatey/bin/RefreshEnv.cmd