diff --git a/appveyor.yml b/appveyor.yml
index a60f341c..fa72e21c 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -1,14 +1,14 @@
 version: 1.0.{build}
 install:
 - ps: Invoke-WebRequest 'https://github.com/embree/embree/releases/download/v2.9.0/embree-2.9.0.win32.windows.zip' -OutFile 'embree.zip'
-- ps: 7z x embree.zip
+- ps: 7z x embree.zip -oc:\
 build_script:
 - ps: >-
     mkdir cmakebuild
 
     cd cmakebuild
 
-    cmake .. -Dembree_DIR=..\embree-2.9.0.win32.windows\lib\cmake\embree-2.9.0
+    cmake .. -Dembree_DIR="c:\embree-2.9.0.win32.windows\lib\cmake\embree-2.9.0"
 
     msbuild PACKAGE.vcxproj /p:Configuration=Release /logger:"C:\Program Files\AppVeyor\BuildAgent\Appveyor.MSBuildLogger.dll"
 artifacts: