diff --git a/.appveyor.yml b/.appveyor.yml
index 8116647c0..d3b945ba4 100644
--- a/.appveyor.yml
+++ b/.appveyor.yml
@@ -31,6 +31,8 @@ test_script:
 deploy_script:
   ps: |
     if(($Env:APPVEYOR_REPO_BRANCH -match "master") -or ($Env:APPVEYOR_REPO_TAG -match "true")) {
+      pip install -U virtualenv
+      dev.bat
       python .\release\rtool.py bdist
       python .\release\rtool.py upload-snapshot --bdist
     }