After some testing on macosx the ouroboros module seems to work fine. With ouroboros's alchemy tool you can append arbitrary files to your nimrod binaries and use ouroboros to read them back. Version 0.2.0 is released.
Enjoy!
Keep up the good work!
And now let me hijack this thread. Would you kindly read https://github.com/Araq/Nim/blob/devel/doc/nimc.txt, section "ImportCpp pragma", and come up with a similar design for improved Objective C support? I couldn't find relevant github issues for the problems you encountered with our current importobjc pragma.