diff --git a/.appveyor.yml b/.appveyor.yml
index 195ce8eab..46f9c5898 100644
--- a/.appveyor.yml
+++ b/.appveyor.yml
@@ -56,6 +56,7 @@ before_build:
   - git submodule update --init --recursive
 
 build_script:
+  - rmdir build
   - mkdir build
   - cd build
   - C:\projects\deps\cmake\cmake-3.10.1-win64-x64\bin\cmake.exe -GNinja ..