Xcode : ld: library not found for -lXnDDK

[vvzen]

After following all of the described steps I get this (last?) error on El Capitan and Xcode:

ld: library not found for -lXnDDK
clang: error: linker command failed with exit code 1 (use -v to see invocation)

How to solve that? Am I missing another step? I didn't find anything else online. Thanks!