Objective c 合并SwiftyJSON.swiftmodule失败，错误为没有此类文件或目录

我已经升级到Xcode 7，我的项目升级到Swift2。我的项目是ObjC和Swift代码的混合体。我还升级到可可豆0.38.2。升级后，项目无法编译。具体而言，编译失败，出现以下错误：

Command /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/swiftc failed with exit code 1 

我已将此问题追溯到以下消息：

MergeSwiftModule normal x86_64 /Users/murdockcrc/repos/HdV%20-%20iOS/Build/Intermediates/Pods.build/Debug-iphonesimulator/SwiftyJSON.build/Objects-normal/x86_64/SwiftyJSON.swiftmodule
which fails with the following error:
<unknown>:0: error: error opening '/Users/murdockcrc/repos/HdV%20-%20iOS/Build/Intermediates/Pods.build/Debug-iphonesimulator/SwiftyJSON.build/Objects-normal/x86_64/SwiftyJSON-Swift.h' for output: No such file or directory 

# Uncomment this line to define a global platform for your project
# platform :ios, '8.0'
source 'https://github.com/CocoaPods/Specs.git'
platform :ios, '8.0'
use_frameworks!

target 'Helden der Volksmusik' do

pod 'DateTools', '1.5.0'
pod 'UALogger', '~> 0.3'
pod 'KZPropertyMapper', '2.5.0'
pod 'AFNetworking', '2.5.4'
pod "MTJSONUtils"
pod "TTTAttributedLabel", "1.13.3"
pod 'PureLayout', '2.0.6'
pod 'Alamofire', '~> 2.0'
pod 'SwiftyJSON', :git => 'https://github.com/SwiftyJSON/SwiftyJSON.git', :branch => 'xcode7'
pod 'SwiftDate', :git => 'https://github.com/malcommac/SwiftDate.git', :branch => 'swift-2.0'
pod 'SwiftSpinner', '0.8.0'

end

target 'Helden der VolksmusikTests' do

pod 'DateTools', '1.5.0'
pod 'UALogger', '~> 0.3'
pod 'KZPropertyMapper', '2.5.0'
pod 'AFNetworking', '2.5.4'
pod "MTJSONUtils"
pod "TTTAttributedLabel", "1.13.3"
pod 'PureLayout', '2.0.6'
pod 'Alamofire', '~> 2.0'
pod 'SwiftyJSON', :git => 'https://github.com/SwiftyJSON/SwiftyJSON.git', :branch => 'xcode7'
pod 'SwiftDate', :git => 'https://github.com/malcommac/SwiftDate.git', :branch => 'swift-2.0'

end