You sure the tar version you're using is GNU? If not, you can download this tar then: Code: cp /where/you/downloaded/that/tar /usr/bin/tar
cp /where/you/downloaded/that/tar /usr/bin/tar
tar: unrecognized option '--format=gnu' BusyBox v1.19.0.git (MeeGo 3:1.19-8+0m6) multi-call binary. Usage: tar -[cxtzjhmvO] [-X FILE] [-T FILE] [-f TARFILE] [-C DIR] [FILE]... dpkg-deb: subprocess tar -cf returned error exit status 1