diff --git a/appveyor.yml b/appveyor.yml
index a7f7e2de0..b6feac2a5 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -8,7 +8,7 @@ configuration:
 install:
   - cmd: git clone https://github.com/ogrisel/python-appveyor-demo
   - cmd: copy python-appvegor-demo\appvegor\install.ps1 install.ps1
-  - ps: .\\install.ps1
+  - ps: install.ps1
   - "SET PATH=%PYTHON%;%PYTHON%\\Scripts;%PATH%"
   - "python --version"
   - "python -c \"import struct; print(struct.calcsize('P') * 8)\""