$ tail -1 /var/db/pkg/wmctrl-1.07p6/+DESC WWW: https://sites.google.com/site/tstyblo/wmctrl/
above hosts non-64 bit version which on amd64 with blackbox turns unusable at least in the following ways, fwiw: - some simply and uniquely titled windows get ignored in the listing, - some uniquely titled windows appear in the listing after a long time after creation only, - some desktop id sometimes gets a nonsense value, all solved in the 64 bit patched fork that can be found at https://github.com/dancor/wmctrl, thou, as not an author's work, probably(?) may not be turned into a package hence the original one might be considered for not including in 64 bit platforms future packages' suits /ty