:~ $ sudo port clean tophat
Password:
--->  Cleaning tophat
:~ $ sudo port install tophat
--->  Computing dependencies for tophat
--->  Fetching archive for tophat
--->  Attempting to fetch tophat-1.2.0_0.darwin_11.x86_64.tbz2 from http://packages.macports.org/tophat
--->  Fetching distfiles for tophat
--->  Verifying checksum(s) for tophat
--->  Extracting tophat
--->  Configuring tophat
--->  Building tophat
Error: org.macports.build for port tophat returned: command execution failed
Please see the log file for port tophat for details:
    /opt/local/var/macports/logs/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_science_tophat/tophat/main.log
To report a bug, follow the instructions in the guide:
    http://guide.macports.org/#project.tickets
Error: Processing of port tophat failed
:~ $