uberjar can't find gluegen-rt

[Cayenne]

My app works via "lein run" but when I try to create and run the uberjar, I get this:

Exception in thread "Animation Thread" java.lang.UnsatisfiedLinkError: no gluegen-rt in java.library.path

Anyone know what I might do to fix this?  Is there other information I should provide?  (My code is at https://github.com/cayennes/blocks-in-space .)

Thanks for any help.

- Cayenne