I'm stupid it's a path issue. The script is located in /usr/lib/GNUstep/System/Applications/WPrefs.app/WPrefs.
A ln -sf to where wmaker looks for WPrefs resolved the issue.
I'm stupid it's a path issue. The script is located in /usr/lib/ GNUstep/ System/ Applications/ WPrefs. app/WPrefs.
A ln -sf to where wmaker looks for WPrefs resolved the issue.