Windows CI: Leverage 'install' section
diff --git a/appveyor.yml b/appveyor.yml
index ee3f4eb..166de5b 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -8,12 +8,11 @@
     ARCH: 32
   - GENERATOR: "Visual Studio 11 Win64"
     ARCH: 64
+install:
+  - cinst cmake
+  - cinst python2
 build_script:
 - ps: >-
-    choco install cmake
-
-    choco install python2
-
     mkdir build
 
     cd build