This is what dpkg-deb -c gave me: /home/user # dpkg-deb -c /media/mmc2/numptyphysics_0.1_armel.deb drwxr-xr-x 0/0 0 2008-04-01 15:11:15 . drwxr-xr-x 0/0 0 2008-04-01 15:11:13 ./usr drwxr-xr-x 0/0 0 2008-04-01 15:11:15 ./usr/bin -rwxr-xr-x 0/0 167340 2008-04-01 15:11:15 ./usr/bin/numptyphysics tar: Short header dpkg-deb: subprocess tar returned error exit status 1 /home/user # I find it confusing, as I definitely don't have ./usr/bin/numptyphysics. [...]