tightvnc returned: command execution failed

[jcezanna56@…]

I got an error building tightvnc :

root# port upgrade outdated
--->  Computing dependencies for tightvnc
--->  Building tightvnc
Error: org.macports.build for port tightvnc returned: command execution failed
Please see the log file for port tightvnc for details:
    /opt/local/var/macports/logs/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_x11_tightvnc/tightvnc/main.log
Error: Unable to upgrade port: 1
To report a bug, follow the instructions in the guide:
    http://guide.macports.org/#project.tickets

[jcezanna56@…]

following the instruction after such error I made a port clean an got an other error

root# port clean
Can't map the URL 'file://.' to a port description file ("Could not find Portfile in /private/var/root").
Please verify that the directory and portfile syntax are correct.
To use the current port, you must be in a port's directory.

[ryandesign (Ryan Carsten Schmidt)]

To clean, you need to specify what port to clean. In this case, please run:

sudo port clean tightvnc

Then attach the main.log file.

Also, it looks like you are logged in as root. If so, that's not advisable. Instead, we recommend using sudo while logged in as an administrative user, not root.

[jcezanna56@…]

log file for building tightvnc