easy_install crashed with ImportError in setup.py: No module named Pyrex.Distutils

[Somberlain]

crashed after i tried to install pyalsa module

ProblemType: Crash
DistroRelease: Ubuntu 11.10
Package: python-setuptools 0.6.16-1
ProcVersionSignature: Ubuntu 3.0.0-15.24-generic 3.0.13
Uname: Linux 3.0.0-15-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 1.23-0ubuntu4
Architecture: amd64
Date: Tue Dec 27 20:03:25 2011
ExecutablePath: /usr/bin/easy_install
InstallationMedia: Ubuntu 10.04 LTS "Lucid Lynx" - Release amd64 (20100429)
InterpreterPath: /usr/bin/python2.7
PackageArchitecture: all
ProcCmdline: /usr/bin/python /usr/bin/easy_install pyalsa
ProcEnviron:
 PATH=(custom, no user)
 LANG=ru_RU.UTF-8
 SHELL=/bin/bash
PythonArgs: ['/usr/bin/easy_install', 'pyalsa']
SourcePackage: distribute
Title: easy_install crashed with ImportError in setup.py: No module named Pyrex.Distutils
UpgradeStatus: Upgraded to oneiric on 2011-12-03 (24 days ago)
UserGroups:

[Julian Taylor (jtaylor)]

this looks like a missing dependency in the pyalsa egg, please report it to them.

installing the python-pyrex package allows installation.