Pkg xen devel - Feb 2012 - xen-toolstack-wrapper (xen-4.1.2-3) does not work

/usr/lib/xen-common/bin/xen-toolstack returns /usr/sbin/xm (or 
/usr/sbin/xl), I had to modify 
/usr/lib/xen-common/bin/xen-toolstack-wrapper such a way to make it work:

exec "/usr/lib/xen-default/bin/"`echo $TOOLSTACK | awk -F'/'
'{ print $4
}'` "$@"

originally it returned /usr/sbin/[xm,xl] bringing to an endless loop.

Niccol?