I have enabled XFCE ports, and created the .rsync file manually
#cat > /etc/ports/cfce.rsync << EOF
>host=crux.nu
>collection=ports/crux-3.1/xfce
>EOF

however, when I run #prt-get depinst -if xfce4  the result is "package has not been found" I have run #ports -u and #prt-get sysup before...