Running 'sbuild -Asv --dpkg-file-suffix=+jan --force-orig-source --source-only-changes'
Building using working tree
Building package in normal mode
Looking for a way to retrieve the upstream tarball
Looking for upstream tarball in local branch.
Using pristine-tar to reconstruct dnscat2/0.07+git20200409.1.8664c0e.
pristine-tar: successfully generated /tmp/tmp8mt9q103/dnscat2_0.07+git20200409.1.8664c0e.orig.tar.gz
Building the package in /tmp/tmp8mt9q103/build-area/dnscat2-0.07+git20200409.1.8664c0e, using sbuild -Asv --dpkg-file-suffix=+jan --force-orig-source --source-only-changes
dpkg-source: info: using source format '3.0 (quilt)'
dpkg-source: info: building dnscat2 using existing ./dnscat2_0.07+git20200409.1.8664c0e.orig.tar.gz
dpkg-source: info: using patch list from debian/patches/series
patching file client/Makefile
Hunk #1 FAILED at 9.
1 out of 1 hunk FAILED
dpkg-source: info: the patch has fuzz which is not allowed, or is malformed
dpkg-source: info: if patch 'keep-upstream-CFLAGS.patch' is correctly applied by quilt, use 'quilt refresh' to update it
dpkg-source: error: LC_ALL=C patch -t -F 0 -N -p1 -u -V never -E -b -B .pc/keep-upstream-CFLAGS.patch/ --reject-file=- < dnscat2-0.07+git20200409.1.8664c0e.orig.ey8XaO/debian/patches/keep-upstream-CFLAGS.patch subprocess returned exit status 1
E: Failed to package source directory /tmp/tmp8mt9q103/build-area/dnscat2-0.07+git20200409.1.8664c0e
brz: ERROR: The build failed.