Update: Just before posting this, I thought that I would try Xcode 7 Beta 2, and it worked!
I'm trying to update my build server from Xcode 6.3 to Xocde 7 beta 3, but getting the following error. On my server I use an enterprise account, so I depend on using the "iOS Distribution" setting for my "In House" configuration instead of hard coding the cert in the project.
+ xcodebuild -project MYAPP.xcodeproj -scheme MYAPP-InHouse archive
=== BUILD TARGET WatchKit App OF PROJECT MYAPP WITH CONFIGURATION In House Distribution ===
Check dependencies
Code Sign error: No matching provisioning profiles found: No valid 'development' profiles were found.
CodeSign error: code signing is required for product type 'WatchKit App' in SDK 'iOS 9.0'
when I modify the build settings on the server and select "My Company name - iOS Distribution Certificate" instead of "iOS Distribution" the build will work, but I need the auto-select to work. It's not clear why it says 'development' in the error, this scheme is configured to use my In House configuration where I had "iOS Distribution" selected. Also everything works fine with Xcode 6.3