"Staging bison into destroot" throws error while "upgrade outdated"

[sykorap@…]

Staging bison into destroot Error: org.macports.destroot for port bison returned: xinstall usage: xinstall [-bCcpSsv] [-B suffix] [-W dir] [-f flags] [-g group] [-m mode]

[-o owner] file1 file2

xinstall [-bCcpSsv] [-B suffix] [-W dir] [-f flags] [-g group] [-m mode]

[-o owner] file1 ... fileN directory

xinstall -d [-v] [-g group] [-m mode] [-o owner] directory ...

Please see the log file for port bison for details:

/opt/local/var/macports/logs/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_devel_bison/bison/main.log

Error: Unable to upgrade port: 1 To report a bug, follow the instructions in the guide:

​http://guide.macports.org/#project.tickets