Library not found for -lOneSignal

Windows 7
Unity 5.1.1p4

When running build in xcode, I receive this error:

clang: error: linker command failed with exit code 1
Library not found for -lOneSignal

I’m using the iOS Native plugin from the asset store. Any ideas? I’ve tried a few solutions through research, but no luck.

FIXED:
Updated the library and framework searchpaths in xcode from:
$(SRCROOT)/Libraries\Plugins/iOS

to…

$(SRCROOT)/Libraries/Plugins/iOS

Use to built again in unity