ld: library not found for -ldb2

[divanvb]

Unable to build on a mac, keep getting this error: ld: library not found for -ldb2

Installed SDK version 4.10.FC12 in the directory /Applications/IBM/informix as it was the default directory suggested.

Any idea what is going on? I've looked at the binding.gyp file as well, even changing the OS from mac to darwin doesn't go for that block as it jumps straight to the undefined x64 OS check.