jack @1.9.12 (audio) Install failed

[fusionx (Prashant Chaudhary)]

As part of GQRX installation, jack keeps failing even after cleaning a few times.

--->  Fetching archive for jack
--->  Attempting to fetch jack-1.9.12_0.darwin_17.x86_64.tbz2 from https://packages.macports.org/jack
--->  Attempting to fetch jack-1.9.12_0.darwin_17.x86_64.tbz2 from http://sea.us.packages.macports.org/macports/packages/jack
--->  Attempting to fetch jack-1.9.12_0.darwin_17.x86_64.tbz2 from http://ywg.ca.packages.macports.org/mirror/macports/packages/jack
--->  Fetching distfiles for jack
--->  Attempting to fetch jack2-1.9.12.tar.gz from https://distfiles.macports.org/jack
--->  Verifying checksums for jack
--->  Extracting jack
--->  Configuring jack
--->  Building jack
Error: Failed to build jack: command execution failed
Error: See /opt/local/var/macports/logs/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_audio_jack/jack/main.log for details.
Error: Follow https://guide.macports.org/#project.tickets to report a bug.
Error: Processing of port gqrx failed

[neverpanic (Clemens Lang)]

Please attach large amounts of output rather than pasting them.

Does this also happen if you build with port -t, e.g. port -t upgrade jack?