diff --git a/.appveyor.yml b/.appveyor.yml
index b1fc10c7..a41fdd9f 100644
--- a/.appveyor.yml
+++ b/.appveyor.yml
@@ -7,6 +7,8 @@ platform:
   - x64
 
 build_script:
+  - cd C:\Libraries\boost_1_71_0
+  - dir /b /s /a:-D
   - call "C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Auxiliary\Build\vcvars64.bat"
   - mkdir build
   - cd build