AttributeError: 'BuildContext' object has no attribute 'add_subdirs'
after running healthcare.cc example in nanosim :
wscript:60: Warning: (in nanonetworks) Requested to build modular python bindings, but apidefs dir not found => skipped the bindings.
wutils.VNUM = None
program 'scratch/examples/health-care' not found; available programs are: ['subdir', 'scratch/subdir/subdir', 'scratch-simulator', 'scratch/scratch-simulator', 'examples', 'scratch/examples/examples', 'test-runner', 'utils/test-runner', 'bench-simulator', 'utils/bench-simulator', 'bench-packets', 'utils/bench-packets', 'print-introspected-doxygen', 'utils/print-introspected-doxygen', 'emu-sock-creator', 'src/emu/emu-sock-creator', 'tap-device-creator', 'src/fd-net-device/tap-device-creator', 'raw-sock-creator', 'src/fd-net-device/raw-sock-creator', 'tap-creator', 'src/tap-bridge/tap-creator']