package python-lzma (not installed) failed to install/upgrade: trying to overwrite '/usr/lib/pyshared/python2.7/lzma.so', which is also in package python-pyliblzma 0.5.3-0ppa9~natty

[Ray Lance]

Binary package hint: python-lzma

trying to install s3ql

ProblemType: Package
DistroRelease: Ubuntu 11.04
Package: python-lzma (not installed)
ProcVersionSignature: Ubuntu 2.6.38-8.42-generic 2.6.38.2
Uname: Linux 2.6.38-8-generic x86_64
NonfreeKernelModules: nvidia
AptOrdering:
 python-lzma: Install
 s3ql: Install
 python-lzma: Configure
 s3ql: Configure
Architecture: amd64
Date: Mon May 23 10:03:18 2011
DpkgTerminalLog:
 Unpacking python-lzma (from .../python-lzma_0.5.3-1ubuntu1_amd64.deb) ...
 dpkg: error processing /var/cache/apt/archives/python-lzma_0.5.3-1ubuntu1_amd64.deb (--unpack):
  trying to overwrite '/usr/lib/pyshared/python2.7/lzma.so', which is also in package python-pyliblzma 0.5.3-0ppa9~natty
ErrorMessage: trying to overwrite '/usr/lib/pyshared/python2.7/lzma.so', which is also in package python-pyliblzma 0.5.3-0ppa9~natty
SourcePackage: python-lzma
Title: package python-lzma (not installed) failed to install/upgrade: trying to overwrite '/usr/lib/pyshared/python2.7/lzma.so', which is also in package python-pyliblzma 0.5.3-0ppa9~natty
UpgradeStatus: Upgraded to natty on 2011-04-29 (24 days ago)

[Guillem Hernandez Sola (guillemhs)]

I have already installed this application, doing this apt-get install python-lzma

No problem.

However, if you are installing python-pyliblzma 0.5.3-0ppa9~natty

You can have more problems

There is an open issue of s3ql here http://code.google.com/p/s3ql/issues/detail?id=248

Additionally, if you follow their installation from here http://code.google.com/p/s3ql/wiki/installation_debian

An user will have this problem in ubuntu 11.04

In a terminal
root@TheRiddle:/home/guillem# sudo apt-get install s3ql

You can experiment this broken package.
 s3ql : Depèn: python-llfuse (>= 0.31) però no serà instal·lat

[Stefano Rivera (stefanor)]

python-pyliblzma is not a package in Ubuntu. The version number indicates it was probably a package from a PPA somewhere.
It's conflicting with python-lzma, which *is* a package in Ubuntu, and the correct package name to provide lzma.so.

Remove python-pyliblzma, and tell that PPA's owner that they should delete it, it's clearly a problem.