package sbuild 0.62.6-1ubuntu2 failed to install/upgrade: subprocess installed post-installation script returned error exit status 7

[Sydney Weidman]

sbuild failed to install during the upgrade to 12.04. I tried to iinstall it via apt-get install sbuild

ProblemType: Package
DistroRelease: Ubuntu 12.04
Package: sbuild 0.62.6-1ubuntu2
ProcVersionSignature: Ubuntu 3.2.0-64.97-generic 3.2.59
Uname: Linux 3.2.0-64-generic x86_64
ApportVersion: 2.0.1-0ubuntu17.6
AptOrdering: sbuild: Configure
Architecture: amd64
Date: Mon Jun 9 06:04:05 2014
DpkgTerminalLog:
 Setting up sbuild (0.62.6-1ubuntu2) ...
 /usr/sbin/delgroup: `sbuild' still has `sbuild' as their primary group!
 dpkg: error processing sbuild (--configure):
  subprocess installed post-installation script returned error exit status 7
DuplicateSignature: package:sbuild:0.62.6-1ubuntu2:subprocess installed post-installation script returned error exit status 7
ErrorMessage: subprocess installed post-installation script returned error exit status 7
InstallationMedia: Ubuntu 10.04 LTS "Lucid Lynx" - Release amd64 (20100429)
MarkForUpload: True
PackageArchitecture: all
SourcePackage: sbuild
Title: package sbuild 0.62.6-1ubuntu2 failed to install/upgrade: subprocess installed post-installation script returned error exit status 7
UpgradeStatus: Upgraded to precise on 2014-06-09 (1 days ago)