While updating audacity, textproc/rapidjson was built but failed with:

```
  ===>  Building for rapidjson-1.1.0.20230928p1
  Change Dir: '/usr/ports/pobj/rapidjson-1.1.0.20230928/build-amd64'

  Run Build Command(s): /usr/local/bin/ninja -v -j 1
  [1/39] ccache /usr/ports/pobj/rapidjson-1.1.0.20230928/bin/c++ -D__STDC_FORMAT_MACROS -I/usr/ports/pobj/rapidjson-1.1.0.20230928/rapidjson-f9d53419e912910fd8fa57d5705fa41425428c35/include -I/usr/ports/pobj/rapidjson-1.1.0.20230928/rapidjson-f9d53419e912910fd8fa57d5705fa41425428c35/example/../include -O2 -pipe -Qunused-arguments -fcolor-diagnostics -Wall -Wextra -Werror -Wno-missing-field-initializers -DNDEBUG -std=gnu++11 -Weffc++ -Wswitch-default -Wfloat-equal -Wconversion -Wimplicit-fallthrough -MD -MT example/CMakeFiles/archivertest.dir/archiver/archiver.cpp.o -MF example/CMakeFiles/archivertest.dir/archiver/archiver.cpp.o.d -o example/CMakeFiles/archivertest.dir/archiver/archiver.cpp.o -c /usr/ports/pobj/rapidjson-1.1.0.20230928/rapidjson-f9d53419e912910fd8fa57d5705fa41425428c35/example/archiver/archiver.cpp
  FAILED: example/CMakeFiles/archivertest.dir/archiver/archiver.cpp.o
  ccache /usr/ports/pobj/rapidjson-1.1.0.20230928/bin/c++ -D__STDC_FORMAT_MACROS -I/usr/ports/pobj/rapidjson-1.1.0.20230928/rapidjson-f9d53419e912910fd8fa57d5705fa41425428c35/include -I/usr/ports/pobj/rapidjson-1.1.0.20230928/rapidjson-f9d53419e912910fd8fa57d5705fa41425428c35/example/../include -O2 -pipe -Qunused-arguments -fcolor-diagnostics -Wall -Wextra -Werror -Wno-missing-field-initializers -DNDEBUG -std=gnu++11 -Weffc++ -Wswitch-default -Wfloat-equal -Wconversion -Wimplicit-fallthrough -MD -MT example/CMakeFiles/archivertest.dir/archiver/archiver.cpp.o -MF example/CMakeFiles/archivertest.dir/archiver/archiver.cpp.o.d -o example/CMakeFiles/archivertest.dir/archiver/archiver.cpp.o -c /usr/ports/pobj/rapidjson-1.1.0.20230928/rapidjson-f9d53419e912910fd8fa57d5705fa41425428c35/example/archiver/archiver.cpp
  ccache: error: Permission denied
  ninja: build stopped: subcommand failed.
```

Recognising that error from the past, running `pkg_delete ccache` fixed
the problem.

Perhaps this means that rapidjson needs:

```
MAKE_ENV =		CCACHE_DISABLE=true
```

?


Laurie