diff --git a/appveyor.yml b/appveyor.yml
index 8a4f56c..f0aa209 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -18,6 +18,7 @@ cache:
 environment:
   global:
     WARNINGS_ARE_ERRORS: 1
+    PKGTYPE: both
 
   matrix:
     - R_VERSION: devel