Error building master with Carthage version 0.17.2 using Xcode version 8.0 beta 6 (8S201h)

[jefferythomas]

Cartfile

github "Anviking/Decodable" "master"
github "mxcl/PromiseKit" "swift-3.0"

Cartfile.resolved

github "Anviking/Decodable" "74f4d114675a011da56a3ec84ff72d6e81c2a2eb"
github "mxcl/PromiseKit" "7743792ca36a76aee8c02b155c92f441f838eaa2"

Command

$ carthage update --platform iOS

Error

*** Building scheme "Decodable-iOS" in Decodable.xcodeproj
** BUILD FAILED **

The following build commands failed:
    PhaseScriptExecution Run\ Script /Users/*******/Library/Developer/Xcode/DerivedData/Decodable-assyftytepsgjdbefngtfgntqjwv/Build/Intermediates/Decodable.build/Release-iphoneos/Decodable-iOS.build/Script-8F0062441C81F26B007BCF48.sh
(1 failure)
./Generator.swift:242:22: error: cannot assign value of type 'String' to type 'NSString'
./Generator.swift:243:22: error: cannot assign value of type 'String' to type 'NSString'
./Generator.swift:244:22: error: cannot assign value of type 'String' to type 'NSString'
./Generator.swift:245:25: error: cannot assign value of type 'String' to type 'NSString'
A shell task (/usr/bin/xcrun xcodebuild -project /Users/*********/Carthage/Checkouts/Decodable/Decodable.xcodeproj -scheme Decodable-iOS -configuration Release -sdk iphoneos ONLY_ACTIVE_ARCH=NO BITCODE_GENERATION_MODE=bitcode CODE_SIGNING_REQUIRED=NO CODE_SIGN_IDENTITY= CARTHAGE=YES clean build) failed with exit code 65:
** BUILD FAILED **

[Anviking]

Yes, haven't updated for beta 6 yet. Will do now-ish.