$ dpkg-buildpackage -rfakeroot -D -us -uc
dpkg-buildpackage: source package ubuntu-snappy
dpkg-buildpackage: source version 1.1.1-0ubuntu1
dpkg-buildpackage: source distribution wily
dpkg-buildpackage: source changed by Ricardo Salveti de Araujo <ricardo.salveti@canonical.com>
dpkg-buildpackage: host architecture amd64
 dpkg-source --before-build go-functional-tests
 fakeroot debian/rules clean
dh clean --buildsystem=golang --with=golang --fail-missing --with systemd
   dh_testdir -O--buildsystem=golang -O--fail-missing
   dh_auto_clean -O--buildsystem=golang -O--fail-missing
   dh_clean -O--buildsystem=golang -O--fail-missing
 dpkg-source -b go-functional-tests
dpkg-source: warning: no source format specified in debian/source/format, see dpkg-source(1)
dpkg-source: info: using source format `1.0'
dpkg-source: warning: Version number suggests Ubuntu changes, but there is no XSBC-Original-Maintainer field
dpkg-source: warning: source directory 'go-functional-tests' is not <sourcepackage>-<upstreamversion> 'ubuntu-snappy-1.1.1'
dpkg-source: warning: .orig directory name go-functional-tests.orig is not <package>-<upstreamversion> (wanted ubuntu-snappy-1.1.1.orig)
dpkg-source: info: building ubuntu-snappy using existing ubuntu-snappy_1.1.1.orig.tar.gz
dpkg-source: info: building ubuntu-snappy in ubuntu-snappy_1.1.1-0ubuntu1.diff.gz
dpkg-source: warning: file go-functional-tests/.bzr/branch/tags has no final newline (either original or modified version)
dpkg-source: error: cannot represent change to .bzr/checkout/dirstate: binary file contents changed
dpkg-source: warning: newly created empty file '.bzr/checkout/views' will not be represented in diff
dpkg-source: warning: executable mode 0775 of 'debian/ubuntu-snappy-cli.postinst' will not be represented in diff
dpkg-source: warning: the diff modifies the following upstream files: 
 .bzr-builddeb/default.conf
 .bzr/README
 .bzr/branch-format
 .bzr/branch/branch.conf
 .bzr/branch/format
 .bzr/branch/last-revision
 .bzr/branch/tags
 .bzr/checkout/conflicts
 .bzr/checkout/format
dpkg-source: info: use the '3.0 (quilt)' format to have separate and documented changes to upstream files, see dpkg-source(1)
dpkg-source: unrepresentable changes to source
dpkg-buildpackage: error: dpkg-source -b go-functional-tests gave error exit status 1