package mount 2.17.2-3.3ubuntu4 failed to install/upgrade: subprocess new pre-installation script returned error exit status 127

[Philippe Delodder]

Binary package hint: util-linux

updating the system.

ProblemType: Package
DistroRelease: Ubuntu 11.04
Package: mount 2.17.2-3.3ubuntu4
ProcVersionSignature: Ubuntu 2.6.38-3.30-generic 2.6.38-rc4
Uname: Linux 2.6.38-3-generic i686
Architecture: i386
Date: Wed Feb 16 07:50:44 2011
DpkgTerminalLog:
 Preparing to replace mount 2.17.2-3.3ubuntu4 (using .../mount_2.17.2-9.1ubuntu1_i386.deb) ...
 /var/lib/dpkg/tmp.ci/preinst: 49: dpkg-vendor: not found
 dpkg: error processing /var/cache/apt/archives/mount_2.17.2-9.1ubuntu1_i386.deb (--unpack):
  subprocess new pre-installation script returned error exit status 127
ErrorMessage: subprocess new pre-installation script returned error exit status 127
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Alpha i386 (20110131)
SourcePackage: util-linux
Title: package mount 2.17.2-3.3ubuntu4 failed to install/upgrade: subprocess new pre-installation script returned error exit status 127