[100%] Built target _docs_examples_verbatim
Scanning dependencies of target docs_depends
[100%] Built target docs_depends
Scanning dependencies of target docs_man
[100%] Building manpages...
Traceback (most recent call last):
  File "/usr/bin/sphinx-build", line 6, in <module>
    from pkg_resources import load_entry_point
  File "/usr/lib64/python3.7/site-packages/pkg_resources/__init__.py", line 3126, in <module>
    @_call_aside
  File "/usr/lib64/python3.7/site-packages/pkg_resources/__init__.py", line 3110, in _call_aside
    f(*args, **kwargs)
  File "/usr/lib64/python3.7/site-packages/pkg_resources/__init__.py", line 3139, in _initialize_master_working_set
    working_set = WorkingSet._build_master()
  File "/usr/lib64/python3.7/site-packages/pkg_resources/__init__.py", line 581, in _build_master
    ws.require(__requires__)
  File "/usr/lib64/python3.7/site-packages/pkg_resources/__init__.py", line 898, in require
    needed = self.resolve(parse_requirements(requirements))
  File "/usr/lib64/python3.7/site-packages/pkg_resources/__init__.py", line 784, in resolve
    raise DistributionNotFound(req, requirers)
pkg_resources.DistributionNotFound: The 'attrs' distribution was not found and is required by packaging
make[3]: *** [doc/rst/CMakeFiles/docs_man] Errore 1
doc/rst/CMakeFiles/docs_man.dir/build.make:57: set di istruzioni per l'obiettivo "doc/rst/CMakeFiles/docs_man" non riuscito
make[2]: *** [doc/rst/CMakeFiles/docs_man.dir/all] Errore 2
CMakeFiles/Makefile2:783: set di istruzioni per l'obiettivo "doc/rst/CMakeFiles/docs_man.dir/all" non riuscito
make[1]: *** [doc/rst/CMakeFiles/docs_man.dir/rule] Errore 2
CMakeFiles/Makefile2:790: set di istruzioni per l'obiettivo "doc/rst/CMakeFiles/docs_man.dir/rule" non riuscito
make: *** [docs_man] Errore 2
Makefile:327: set di istruzioni per l'obiettivo "docs_man" non riuscito
Failures:
  GMT: GMT.SlackBuild return non-zero
bash-4.3#