Hi, I am trying to install Kwant on my mac. I have Macports installed. I ran the following command as described: echo http://downloads.kwant-project.org/macports/ports.tar |\ sudo tee -a /opt/local/etc/macports/sources.conf >/dev/null After running -sudo port selfupdate, I get the following error message: ---> Updating MacPorts base sources using rsync MacPorts base version 2.3.0 installed, MacPorts base version 2.3.3 downloaded. ---> Updating the ports tree Error: Extractinghttp://downloads.kwant-project.org/macports/ports.tar failed (can't read "verboseflag": no such variable) Error: Extracting http://downloads.kwant-project.org/macports/ports.tar failed (can't read "verboseflag": no such variable) Error: Extracting http://downloads.kwant-project.org/macports/ports.tar failed (can't read "verboseflag": no such variable) Error: Extracting http://downloads.kwant-project.org/macports/ports.tar failed (can't read "verboseflag": no such variable) Error: Extracting http://downloads.kwant-project.org/macports/ports.tar failed (can't read "verboseflag": no such variable) Error: Extracting http://downloads.kwant-project.org/macports/ports.tar failed (can't read "verboseflag": no such variable) Error: Extracting http://downloads.kwant-project.org/macports/ports.tar failed (can't read "verboseflag": no such variable) Error: Couldn't sync the ports tree: Synchronization of 7 source(s) failed Please run `port -v selfupdate' for details. Error: /opt/local/bin/port: port selfupdate failed: Couldn't sync the ports tree: Synchronization of 7 source(s) failed Could you please help me with it. Thank you for your time, and I greatly appreciate your help. Best regards, Girish