strange error code 71

[Werner LEMBERG]

[d3b59876b6dde9a4a26135a9c6b59320080eb23f]

While doing

  sudo port -v install grep

I get

  sandbox-exec: sh: No such file or directory
  Command failed:  \
    cd
    "/opt/local/var/macports/build/_opt_macports_macports-ports_sysutils_grep/grep/work/grep-3.3" \
    ./configure --prefix=/opt/local --program-prefix=g 
  Exit code: 71
  Error: Failed to configure grep: configure failure: command execution failed

What does this mean?  What can I do?  Up to now all macports updates
were without problems...


    Werner