Issue in using "New Build System (Preview)" new feature Xcode 9 Swift 4

Question

In Xcode 9 “New Build System (Preview)” option in Build setting (as in the image shown below) has been introduced and it is used for improving build times for the projects as stated in the WWDC session(https://developer.apple.com/videos/play/wwdc2017/402/)

It works fine for new projects which I created in Xcode 9 recently.
But it doesn’t work for my older projects(big ones), And I found the following similar kind of issue log for most of the projects

error: unable to build node: '/Users/admin/Library/Developer/Xcode/DerivedData/PROJECTNAME/Build/Products/Debug-iphonesimulator/PROJECTNAME.app/Info.plist' (node is produced by multiple commands; e.g., ‘313423sfkjsahdfkashdfklahsdlfkjhsalkfjhh33123sfas:CopyPlistFile /Users/admin/Library/Developer/Xcode/DerivedData/PROJECTNAME-hgfopfsnfsimmzcupjfdhkomofte/Build/Products/Debug-iphonesimulator/PROJECTNAME.app/Info.plist /Users/admin/Projects/Official/PROJECTNAME-ios-2100bd9ec02e/PROJECTNAME/SupportingFiles/Info.plist' and '313423sfkjsahdfkashdfklahsdlfkjhsalkfjhh33123sfas:ProcessInfoPlistFile /Users/admin/Library/Developer/Xcode/DerivedData/PROJECTNAME-hgfopfsnfsimmzcupjfdhkomofte/Build/Products/Debug-iphonesimulator/PROJECTNAME.app/Info.plist /Users/admin/Projects/Official/PROJECTNAME-ios-2100bd9ec02e/PROJECTNAME/SupportingFiles/Info.plist')

How to resolve this issue ?

Answer 1

I had the same problem, search for .plist files in the "Copy Bundle Resources" phase, there shouldn't be any plist file there, in my case this was preventing the new build system to build.

Answer 2

I know this is solved, but mine was a different cause. I had two 3rd party SDKs that had simple text files with the same name (LICENSE). This was probably just a warning in the old build system.

I just removed one of the files from the target and everything works again.