Error: rev-upgrade failed: Error rebuilding boost-numpy

[BeastOfBodmin]

$ port -v
MacPorts 2.6.2

$ python --version
Python 3.8.3

$ sudo port clean all

$ sudo port install boost-numpy +python38
Password:


--->  Computing dependencies for boost-numpy
--->  Cleaning boost-numpy
--->  Scanning binaries for linking errors
--->  Found 1 broken file, matching files to ports       
--->  Found 1 broken port, determining rebuild order
You can always run 'port rev-upgrade' again to fix errors.
The following ports will be rebuilt: boost-numpy @1.71.0+no_single+no_static+python38
Continue? [Y/n]: Y
--->  Computing dependencies for boost-numpy
--->  Cleaning boost-numpy
--->  Scanning binaries for linking errors
--->  Found 1 broken file, matching files to ports       
--->  Found 1 broken port, determining rebuild order
--->  Rebuilding in order
     boost-numpy @1.71.0 +no_single+no_static+python38
--->  Computing dependencies for boost-numpy
--->  Fetching distfiles for boost-numpy
--->  Verifying checksums for boost-numpy
--->  Extracting boost-numpy
--->  Applying patches to boost-numpy
--->  Configuring boost-numpy
Error: Failed to configure boost-numpy: boost must be installed with +python38.
Error: See /opt/local/var/macports/logs/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_devel_boost/boost-numpy/main.log for details.
Error: rev-upgrade failed: Error rebuilding boost-numpy
Error: Follow https://guide.macports.org/#project.tickets to report a bug.

$ port installed python*
The following ports are currently installed:
  python2_select @0.0_3 (active)
  python3_select @0.0_1 (active)
  python27 @2.7.16_1
  python27 @2.7.16_2
  python27 @2.7.17_0
  python27 @2.7.18_1 (active)
  python35 @3.5.9_0 (active)
  python36 @3.6.9_1
  python36 @3.6.9_3
  python36 @3.6.10_0 (active)
  python37 @3.7.4_1
  python37 @3.7.5_1
  python37 @3.7.6_0
  python37 @3.7.7_0 (active)
  python38 @3.8.2_0
  python38 @3.8.3_0 (active)
  python_select @0.3_8 (active)

[mf2k (Frank Schima)]

In the future, please use WikiFormatting and add the port maintainer(s) to Cc (port info --maintainers boost-numpy), if any.