diff --git a/appveyor.yml b/appveyor.yml
index a747fb0b2..9240450d0 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -33,6 +33,7 @@ install:
   - "conda list"
 
   # build wradlib
+  - "python setup.py sdist"
   - "python -m pip install . --no-deps --ignore-installed --no-cache-dir"
 
 build: false