Looks like 2170 is trying to build with the older Xcode SDK first. Seemed odd, so just thought I would mention it for the Corona folks.
Here are the warnings I got:
WARNING: Your SDK may be out of date b/c the following SDK directory could not be found: /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS6.1.sdk
WARNING: Using the following SDK instead: /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS7.0.sdk
Probably should be reversed. Try the iPhoneOS7.0.sdk one first, then fall back to the iPhoneOS6.1.sdk one and give the error about SDK being out of date.