SRC RPM is: nyquist-3.04-4b.fc18.1.src.rpm
nyquist include non-free code.
This license is "non-commercial use only", Its non-free.
1. remove non-free code and rebuild.
2. replace fedora free (acceptable licensed) files.
3. remove fedora repos.
Blocking FE-Legal, This is license problem.
This code (all of it) has been relicensed under BSD. See license.txt.
The xlisp source files have not been updated to reflect this fact. Please ask the nyquist upstream to fix the source code to either explicitly state the proper license or simply refer to license.txt.