Failed to locate 'xz' in path

[liangguoqiu@…]

--->  Computing dependencies for dpkg
--->  Dependencies to be installed: coreutils lzmautils perl5 perl5.12 gdbm zlib
--->  Extracting coreutils
Error: org.macports.extract for port coreutils returned: Failed to locate 'xz' in path: '/opt/local/bin:/opt/local/sbin:/bin:/sbin:/usr/bin:/usr/sbin' or at its MacPorts configuration time location, did you move it?
Error: Failed to install coreutils
Please see the log file for port coreutils for details:
    /opt/local/var/macports/logs/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_sysutils_coreutils/coreutils/main.log
Error: The following dependencies were not installed: coreutils lzmautils perl5 perl5.12 gdbm zlib
To report a bug, follow the instructions in the guide:
    http://guide.macports.org/#project.tickets
Error: Processing of port dpkg failed

[mf2k (Frank Schima)]

What is the output of the following?

port installed xz