anchor.diff:          log "Installation failed."
           exit 1
       else
  +        clean_out_old_releases
           log "Installation complete."    
       fi
   }
  
positive.code:             -i)
                  shift;
                  export INSTALL_ROOT="$1"
                  shift;;
              -o)
                  shift;
  
negative.code:     if [ -z "$USE_FLAT_RELEASE_DIRECTORY" ] ; then
          RELEASE_ID=<%= release_id %>
          DATESTAMP=$(date +%Y%m%d%H%M%S)
          INSTALL_DIR="${RELEASES_DIR}/${RELEASE_ID:-$DATESTAMP}"
      fi
  
      if [ -d "${INSTALL_DIR}" ] ; then
  