sbuild has a option --build-dir, or $build_dir in sbuild.conf. It specifies the output directory for build artifacts. When a to-be-created directory name is supplied to this argument, it is expected that sbuild will create the directory, while currently sbuild don't do that and writes a file with a deb file: $ cd `mktemp -d` $ apt source --download-only hello $ sbuild --build-dir sbuild-artifacts --no-run-lintian --no-run-piuparts --no-run-autopkgtest *.dsc (...) du: cannot access 'sbuild-artifacts/hello_2.12.3-1.dsc': No such file or directory E: read_command failed to execute du E: Cannot determine space needed for sbuild-artifacts/hello_2.12.3-1.dsc (du failed): (...) $ ls -al sbuild-artifacts -rw-r--r-- 1 billchenchina billchenchina 77352 Jun 26 03:02 sbuild-artifacts $ file sbuild-artifacts sbuild-artifacts: Debian binary package (format 2.0), with control.tar.xz , data compression xz $ dpkg -I sbuild-artifacts new Debian package, version 2.0. size 77352 bytes: control archive=1976 bytes. 779 bytes, 21 lines control 3903 bytes, 53 lines md5sums Package: hello Version: 2.12.3-1 Architecture: amd64 (...) Please consider do some checks, create the directory if it does not exist, before copying build artifacts from chroot to the build-dir.