[Zenwalk + bygge pakker] Kan ikke udføre buildpkg -x

Hey jeg prøver at installere playonlinux på zenwalk, og gør følgende
How do I build/install a package from a ZENBUILD file?

1. Browse or Search until you find the program you are looking for
2. Download the ZENBUILD
3. In your Terminal, go to the download directory, make a new folder for your package, and put the ZENBUILD file in that folder.
4. Edit the ZENBUILD and make sure the details and version are up-to-date and correct.
5. Type: su root
6. Type: buildpkg -x
7. Type: installpkg

men når jeg når til step 6 får jeg det her fra terminal:

root[PlayLinux]# buildpkg -x
bash: buildpkg: command not found

så eeh hvad faen gør jeg?
jeg bruge Gnome som DE