On 01/20/2015 08:23 AM, Paolo Cavallini wrote: > gbp-clone git://anonscm.debian.org/pkg-grass/otb.git > cd otb/ > git-buildpackage > gbp:error: upstream/4.2.1 is not a valid treeish Looks like you didn't checkout the upstream and pristine-tar branches. You can checkout all branches at once using `gbp-clone --all <URL>`. Kind Regards, Bas -- GPG Key ID: 4096R/E88D4AF1 Fingerprint: 8182 DE41 7056 408D 6146 50D1 6750 F10A E88D 4AF1