diff --git a/.appveyor.yml b/.appveyor.yml
index 36db04b..8e03f22 100644
--- a/.appveyor.yml
+++ b/.appveyor.yml
@@ -54,6 +54,7 @@ cache:
 
 install:
 #  - C:\cygwin64\bin\du -hs "%LOCALAPPDATA%\pip\Cache"
+  - cmd: C:\cygwin64\setup-x86_64.exe -qnNdO -R C:/cygwin64 -s http://cygwin.mirror.constant.com -l C:/cygwin64/var/cache/setup -P mingw64-x86_64-gcc-g++ -P mingw64-x86_64-gcc-core -P mingw64-i686-gcc-g++ -P mingw64-i686-gcc-core
   - set PATH=%GIT%;%PYTHON%;%PYTHON%\Scripts;%GOPATH%;%CYGWIN_64%\bin;%PATH%
   - env
   - python --version