Ign:1 http://deb.debian.org/debian sid InRelease
Ign:1 http://deb.debian.org/debian sid InRelease
Ign:1 http://deb.debian.org/debian sid InRelease
Err:1 http://deb.debian.org/debian sid InRelease
  Temporary failure resolving 'deb.debian.org'
Reading package lists...
W: Failed to fetch http://deb.debian.org/debian/dists/sid/InRelease  Temporary failure resolving 'deb.debian.org'
W: Some index files failed to download. They have been ignored, or old ones used instead.
Executing: apt-get update
Completed.
Reading package lists...
Building dependency tree...
Reading state information...
E: Unable to locate package piuparts
E: Unable to locate package mmdebstrap
Executing: apt-get --yes install piuparts mmdebstrap