Fix AppVeyor breakage.

kinetiknz · kinetiknz · commit f305ca7b5b2e · 2017-10-24T16:13:51.000+13:00
diff --git a/appveyor.yml b/appveyor.yml
@@ -4,7 +4,9 @@ install:
 build_script:
 - cmd: |-
     cd c:\projects\cubeb
-    cmake .
+    mkdir build
+    cd build
+    cmake ..
     cmake --build . --config Debug
 
 build:
