Error: Port android is still broken after rebuilding it more than 3 times.

[askg]

stiegl:lib askg$ sudo port -d -y rev-upgrade
DEBUG: Copying /Users/askg/Library/Preferences/com.apple.dt.Xcode.plist to /opt/local/var/macports/home/Library/Preferences
--->  Scanning binaries for linking errors
--->  No broken files found.
android is using libstdc++ (this installation is configured to use libc++)
--->  Found 1 broken port, determining rebuild order
DEBUG: Broken: android
DEBUG: Processing port android @0:23_0  
You can always run 'port rev-upgrade' again to fix errors.
The following ports will be rebuilt: android @23
Continue? [Y/n]: Y
DEBUG: epoch: in tree: 0 installed: 0
DEBUG: android 23_0 exists in the ports tree
DEBUG: android 23_0  is the latest installed
DEBUG: android 23_0  is active
DEBUG: Merging existing variants '' into variants
DEBUG: new fully merged portvariants: 
DEBUG: Changing to port directory: /opt/local/var/macports/sources/rsync.macports.org/release/tarballs/ports/java/android
DEBUG: OS darwin/17.6.0 (Mac OS X 10.13) arch i386
DEBUG: universal_variant is false, so not adding the default universal variant
DEBUG: Running callback portconfigure::add_automatic_compiler_dependencies
DEBUG: Finished running callback portconfigure::add_automatic_compiler_dependencies
DEBUG: Running callback portbuild::add_automatic_buildsystem_dependencies
DEBUG: Finished running callback portbuild::add_automatic_buildsystem_dependencies
DEBUG: Running callback portstartupitem::add_notes
DEBUG: Finished running callback portstartupitem::add_notes
DEBUG: rev-upgrade override ... upgrading!
Skipping deactivate android @23_0 (dry run)
Skipping activate android @23_0 (dry run)
DEBUG: Rebuilding port android finished with status 0

MacPorts base version 2.5.2