Macports port install keybase dependency gnupg fails

[gurlinthewurld@…]

I have been trying to install keybase on my OSX external dev drive. It fails to install gnupg. I ran

sudo port clean gnupg

and

sudo port -v install gnupg

and then to get the details

cat /opt/local/var/macports/logs/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_mail_gnupg/gnupg/main.log

Is this an issue with my drive's paths? My other ports seem to be fine, and I selfupdate regularly. Thanks in advance.

    :info:configure config.status: executing po-directories commands
        :info:configure config.status: creating po/POTFILES
        :info:configure config.status: creating po/Makefile
        :info:configure 
        :info:configure                 Version info:   gnupg 1.4.20
        :info:configure                 Configured for: Darwin (x86_64-apple-darwin15.5.0)
        :info:configure 
        :debug:configure Privilege de-escalation not attempted as not running as root.
        :debug:build build phase started at Thu Jun  9 13:11:22 EDT 2016
        :notice:build --->  Building gnupg
        :debug:build Executing org.macports.build (gnupg)
        :debug:build Environment: 
        CC_PRINT_OPTIONS='YES'
        CC_PRINT_OPTIONS_FILE='/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_mail_gnupg/gnupg/work/.CC_PRINT_OPTIONS'
        CPATH='/opt/local/include'
        LIBRARY_PATH='/opt/local/lib'
        MACOSX_DEPLOYMENT_TARGET='10.11'
        :debug:build Assembled command: 'cd "/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_mail_gnupg/gnupg/work/gnupg-1.4.20" && /usr/bin/make -j4 -w all'
        :debug:build Executing command line:  cd "/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_mail_gnupg/gnupg/work/gnupg-1.4.20" && /usr/bin/make -j4 -w all 
        :info:build make: Entering directory `/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_mail_gnupg/gnupg/work/gnupg-1.4.20'
        :info:build /Volumes/Macintosh HD/Applications/Xcode.app/Contents/Developer/usr/bin/make  all-recursive
        :info:build make: /Volumes/Macintosh: No such file or directory
        :info:build make: *** [all] Error 1
        :info:build make: Leaving directory `/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_mail_gnupg/gnupg/work/gnupg-1.4.20'
        :info:build Command failed:  cd "/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_mail_gnupg/gnupg/work/gnupg-1.4.20" && /usr/bin/make -j4 -w all 
        :info:build Exit code: 2
        :error:build org.macports.build for port gnupg returned: command execution failed
        :debug:build Error code: CHILDSTATUS 12774 2
        :debug:build Backtrace: command execution failed
            while executing
        "system -nice 0 $fullcmdstring"
            ("eval" body line 1)
            invoked from within
        "eval system $notty $nice \$fullcmdstring"
            invoked from within
        "command_exec build"
            (procedure "portbuild::build_main" line 8)
            invoked from within
        "portbuild::build_main org.macports.build"
            ("eval" body line 1)
            invoked from within
        "eval $procedure $targetname"
        :info:build Warning: targets not executed for gnupg: org.macports.activate org.macports.build org.macports.destroot org.macports.install
        :notice:build Please see the log file for port gnupg for details:
            /opt/local/var/macports/logs/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_mail_gnupg/gnupg/main.log