i downloaded smontgomeries calendar-module but the building process failed.

./build.py
2010-11-24 09:35:16.455 xcodebuild[2142:80b] Error loading /Developer/Platforms/iPhoneOS.platform/Developer/Library/Xcode/Plug-ins/iPhoneOS Build System Support.xcplugin/Contents/MacOS/iPhoneOS Build System Support:  dlopen(/Developer/Platforms/iPhoneOS.platform/Developer/Library/Xcode/Plug-ins/iPhoneOS Build System Support.xcplugin/Contents/MacOS/iPhoneOS Build System Support, 265): Library not loaded: /System/Library/PrivateFrameworks/MobileDevice.framework/Versions/A/MobileDevice
  Referenced from: /Developer/usr/bin/../../Library/Frameworks//../../Platforms/iPhoneOS.platform/Developer/Library/PrivateFrameworks/DTDeviceKitBase.framework/Versions/A/DTDeviceKitBase
  Reason: image not found
2010-11-24 09:35:16.455 xcodebuild[2142:80b] WARNING: Failed to load plugin at: /Developer/Platforms/iPhoneOS.platform/Developer/Library/Xcode/Plug-ins/iPhoneOS Build System Support.xcplugin, skipping.  Could not load bundle.
Build settings from command line:
    PLATFORM_NAME = iphoneos
    SDKROOT = /Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS4.1.sdk

2010-11-24 09:35:16.591 xcodebuild[2142:80b] Platform validation failed for Class 'DTDKProvisioningProfileController'
2010-11-24 09:35:16.606 xcodebuild[2142:80b] [MT] ASSERTION FAILURE in /SourceCache/DevToolsBase/DevToolsBase-1705/pbxcore/Target.subproj/PBXTarget.m:1603
Details:  Platform failed to completely load.  Examine Console Log for error messages.
Object:   <PBXNativeTarget:0x100df0260>
Method:   -createPropertyExpansionContextWithBuildState:
Thread:   <NSThread: 0x100a141c0>{name = (null), num = 1}
Backtrace:
  0  0x0000000100325d9b -[XCAssertionHandler handleFailureInMethod:object:fileName:lineNumber:messageFormat:arguments:] (in DevToolsCore)
  1  0x0000000100325b1f _XCAssertionFailureHandler (in DevToolsCore)
  2  0x0000000100134ca1 -[PBXTarget createPropertyExpansionContextWithBuildState:] (in DevToolsCore)
  3  0x0000000100134212 -[PBXTarget createPropertyExpansionContextWithBuildAction:configurationName:] (in DevToolsCore)
  4  0x0000000100133ca2 -[PBXTarget cachedPropertyExpansionContextForConfigurationNamed:] (in DevToolsCore)
  5  0x0000000100133b33 -[PBXTarget expandedValueForString:forConfigurationNamed:] (in DevToolsCore)
  6  0x0000000100133a3c -[PBXNativeTarget fullProductNameForConfigurationNamed:] (in DevToolsCore)
  7  0x00000001001319c8 -[PBXTarget fullProductName] (in DevToolsCore)
  8  0x0000000100131974 -[PBXReference setProducingTarget:] (in DevToolsCore)
  9  0x0000000100131404 -[PBXTarget awakeFromPListUnarchiver:] (in DevToolsCore)
 10  0x0000000100130d11 -[PBXNativeTarget awakeFromPListUnarchiver:] (in DevToolsCore)
 11  0x00007fff80a2a8b4 -[NSArray makeObjectsPerformSelector:withObject:] (in CoreFoundation)
 12  0x000000010011dc8c -[PBXPListUnarchiver decodeRootObject] (in DevToolsCore)
 13  0x000000010011bda4 +[PBXProject projectWithFile:errorHandler:readOnly:] (in DevToolsCore)
 14  0x000000010000bcda
 15  0x0000000100001b7c
2010-11-24 09:35:16.607 xcodebuild[2142:80b] ASSERTION FAILURE in /SourceCache/DevToolsBase/DevToolsBase-1705/pbxcore/Target.subproj/PBXTarget.m:1603
Details:  Platform failed to completely load.  Examine Console Log for error messages.
Object:   <PBXNativeTarget:0x100df0260>
Method:   -createPropertyExpansionContextWithBuildState:
Thread:   <NSThread: 0x100a141c0>{name = (null), num = 1}
Backtrace:
  0  0x0000000100325d9b -[XCAssertionHandler handleFailureInMethod:object:fileName:lineNumber:messageFormat:arguments:] (in DevToolsCore)
  1  0x0000000100325b1f _XCAssertionFailureHandler (in DevToolsCore)
  2  0x0000000100134ca1 -[PBXTarget createPropertyExpansionContextWithBuildState:] (in DevToolsCore)
  3  0x0000000100134212 -[PBXTarget createPropertyExpansionContextWithBuildAction:configurationName:] (in DevToolsCore)
  4  0x0000000100133ca2 -[PBXTarget cachedPropertyExpansionContextForConfigurationNamed:] (in DevToolsCore)
  5  0x0000000100133b33 -[PBXTarget expandedValueForString:forConfigurationNamed:] (in DevToolsCore)
  6  0x0000000100133a3c -[PBXNativeTarget fullProductNameForConfigurationNamed:] (in DevToolsCore)
  7  0x00000001001319c8 -[PBXTarget fullProductName] (in DevToolsCore)
  8  0x0000000100131974 -[PBXReference setProducingTarget:] (in DevToolsCore)
  9  0x0000000100131404 -[PBXTarget awakeFromPListUnarchiver:] (in DevToolsCore)
 10  0x0000000100130d11 -[PBXNativeTarget awakeFromPListUnarchiver:] (in DevToolsCore)
 11  0x00007fff80a2a8b4 -[NSArray makeObjectsPerformSelector:withObject:] (in CoreFoundation)
 12  0x000000010011dc8c -[PBXPListUnarchiver decodeRootObject] (in DevToolsCore)
 13  0x000000010011bda4 +[PBXProject projectWithFile:errorHandler:readOnly:] (in DevToolsCore)
 14  0x000000010000bcda
 15  0x0000000100001b7c
xcodebuild: Error: couldn't load project /Users/xxx/Downloads/smontgomerie-Appcelerator-Calendar-Module-1473cb7/CalendarModule.xcodeproj
xcodebuild failed
isdeblnmac20:smontgomerie-Appcelerator-Calendar-Module-1473cb7