Q: Use iPhoto album for screensaver

Using Yosemite 10.10.2 and iPhoto 9.6.1.  I want to use an iPhoto Album as the Screensaver; I have been doing this for years with all previous OS and iPhoto versions.  Now, the "Source" in the System Preferences: Screensaver Pane: My Pictures has a limited set of options.  1. Under Photo Library, I can pick one or many individual photos, but Albums are not listed.  2. Under "Choose Folder, I can choose "Picture", but iPhoto Library is gray (not selectable).