[MonoDevelop] Build issue monotouch-monodevelop

[Sebastian Rudbach]

Error 1: mtouch failed with the following message:
In file included from /Developer/MonoTouch/SDKs/MonoTouch1.0.iphoneos.sdk/usr/include/mono/metadata/appdomain.h:13,
                 from /Developer/MonoTouch/SDKs/MonoTouch1.0.iphoneos.sdk/usr/include/mono/jit/jit.h:11,
                 from /var/folders/0-/0-7spRb7FVSh7Yl3GYrFmk+++TI/-Tmp-/tmp9b5eec3.tmp/main.m:10:
/Developer/MonoTouch/SDKs/MonoTouch1.0.iphoneos.sdk/usr/include/glib.h:91:1: warning: "ABS" redefined
In file included from /Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS3.0.sdk/System/Library/Frameworks/Foundation.framework/Headers/Foundation.h:8,
                 from /Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS3.0.sdk/System/Library/Frameworks/UIKit.framework/Headers/UIAccelerometer.h:8,
                 from /Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS3.0.sdk/System/Library/Frameworks/UIKit.framework/Headers/UIKit.h:9,
                 from /var/folders/0-/0-7spRb7FVSh7Yl3GYrFmk+++TI/-Tmp-/tmp9b5eec3.tmp/main.m:9:
/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS3.0.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSObjCRuntime.h:200:1: warning: this is the location of the previous definition

Unhandled Exception: System.IO.IOException: Win32 IO returned ERROR_ALREADY_EXISTS. Path: 
  at System.IO.File.Move (System.String sourceFileName, System.String destFileName) [0x00000] in <filename unknown>:0 
  at MTouch.CompileToNative (System.String user_gcc_flags, System.Collections.Generic.List`1 assemblies) [0x00000] in <filename unknown>:0 
  at MTouch.Main (System.String[] args) [0x00000] in <filename unknown>:0 
 (1) (iPhone.MTS.iTraycer)
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