Hello,
>yesterday I upgraded pbuilder from jessie-backports on a Jessie machine: > >$ grep pbuilder /var/log/dpkg.log | grep " installed" >2017-03-16 11:02:36 status installed pbuilder:all 0.228.5~bpo8+1 >2017-03-27 09:22:52 status installed pbuilder:all 0.228.6~bpo8+1 >Since then I get for any build: >... >I: Generated dsc will be overwritten by build result; not generating changes >file >I: Copying COW directory >I: forking: rm -rf /var/cache/pbuilder/build/cow.7226 >I: forking: cp -al /var/cache/pbuilder/base.cow >/var/cache/pbuilder/build/cow.7226 >cp: cannot create hard link '/var/cache/pbuilder/build/cow.7226/dev/ptmx' to >'/var/cache/pbuilder/base.cow/dev/ptmx': Invalid cross-device link >E: Failed cowcopy. I got something similar some time ago, and I fixed by adding APTCACHEHARDLINK=no to my ~/.pbuilderrc configuration file G.
