PermissionError: [Errno 13] Permission denied: '/sbuild-nonexistent'

[PICCA Frederic-Emmanuel <frederic-emmanuel.picca@synchrotron-soleil.fr>]

Hello,

I am preparing the new silx package and I get this error message during the build

WARNING: autodoc: failed to import module 'silx.opencl.codec.byte_offset'; the following exception was raised:
Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/sphinx/ext/autodoc/importer.py", line 152, in import_module
    __import__(modname)
  File "/<<BUILDDIR>>/silx-0.8.0+dfsg/.pybuild/cpython3_3.6_silx/build/silx/opencl/codec/byte_offset.py", line 58, in <module>
    from pyopencl.algorithm import GenericScanKernel
  File "/usr/lib/python3/dist-packages/pyopencl/algorithm.py", line 37, in <module>
    from pyopencl.scan import ScanTemplate
  File "/usr/lib/python3/dist-packages/pyopencl/scan.py", line 1137, in <module>
    key_builder=_NumpyTypesKeyBuilder())
  File "/usr/lib/python3/dist-packages/pytools/persistent_dict.py", line 566, in __init__
    _PersistentDictBase.__init__(self, identifier, key_builder, container_dir)
  File "/usr/lib/python3/dist-packages/pytools/persistent_dict.py", line 463, in __init__
    self._make_container_dir()
  File "/usr/lib/python3/dist-packages/pytools/persistent_dict.py", line 97, in wrapper
    return f(obj, *args, **kwargs)
  File "/usr/lib/python3/dist-packages/pytools/persistent_dict.py", line 505, in _make_container_dir
    _make_dir_recursively(self.container_dir)
  File "/usr/lib/python3/dist-packages/pytools/persistent_dict.py", line 72, in _make_dir_recursively
    os.makedirs(dir)
  File "/usr/lib/python3.6/os.py", line 210, in makedirs
    makedirs(head, mode, exist_ok)
  File "/usr/lib/python3.6/os.py", line 210, in makedirs
    makedirs(head, mode, exist_ok)
  File "/usr/lib/python3.6/os.py", line 210, in makedirs
    makedirs(head, mode, exist_ok)
  File "/usr/lib/python3.6/os.py", line 220, in makedirs
    mkdir(name, mode)
PermissionError: [Errno 13] Permission denied: '/sbuild-nonexistent'


so my question is.

what is the right solutin in order to solve this ?

export HOME=$CURDIR in the rules files (and voila)

or

this is a bug in pytools ?

What I understant is that there is a persitent mechanism which is legitimate in nomal use.

So what is the purpose of HOME pointing no-where during the build process.

thanks for your help.


Frédéric