i have the solution for that, when that happens, only write : su root, and push enter, then write, dpkg -i route/file.deb, where i put route put the route of the deb file (var/blablabla/blablabla/) and where i put file.deb put the name of the file and .deb
PD: what i do is move the file to the root or make a new folder in var, hack folder for example, is easier write /var/hack than /var/blablabla/blablabla..., and change the name of the deb file to "last" for example, to not write lastdayonearth...iosgods.com... you know..
REMEMBER SU ROOT (ENTER)
DPKG -I VAR/HACK/LAST.DEB (ENTER)
RESPRING