windows config

.appveyor.yml

@@ -44,6 +44,8 @@ install:
                 move c:\build-cache\zlib\lib     c:\build-cache\libxlsxwriter\lib
                 move c:\build-cache\zlib\include c:\build-cache\libxlsxwriter\include
 
+                dir c:\build-cache\libxlsxwriter\lib
+
 cache:
         c:\build-cache -> .appveyor.yml