[CMake] Problems with CPack and Mac OS X

[NoRulez]

Hi,

I want to use the package generator PackageMaker.

If I run cpack from the command line I get the Error that my app couldn't be found (without .app)

I have a bundle created with add_executable(MyApp MACOSX_BUNDLE...)

In the cpack configuration I have 
INSTALL(PROGRAMS "${CMAKE_RUNTIME_OUTPUT_DIRECTORY}/MyApp" DESTINATION /opt/MyApp COMPONENT MyApp)

Why it doesn't use MyApp.app? If I declare it, then the error appears that it is a directory

Thanks in advance

Best Regards
NoRulez