Using the complicated version. Need to find maintainer for chocolatey…

… sbt

appveyor.yml

@@ -1,7 +1,18 @@
 version: '{build}'
 os: Windows Server 2012
 install:
-  - choco install sbt
+  - ps: |
+      Add-Type -AssemblyName System.IO.Compression.FileSystem
+      if (!(Test-Path -Path "C:\sbt" )) {
+        (new-object System.Net.WebClient).DownloadFile(
+          'https://dl.bintray.com/sbt/native-packages/sbt/0.13.7/sbt-0.13.7.zip',
+          'C:\sbt-bin.zip'
+        )
+        [System.IO.Compression.ZipFile]::ExtractToDirectory("C:\sbt-bin.zip", "C:\sbt")
+      }
+  - cmd: SET PATH=C:\sbt\sbt\bin;%JAVA_HOME%\bin;%PATH%
+  - cmd: SET SBT_OPTS=-XX:MaxPermSize=2g -Xmx4g
+  - cmd: SET JAVA_OPTS=-XX:MaxPermSize=2g -Xmx4g
 build_script:
   - sbt clean compile
 test_script: