nix-shell -p nox --run "nox-review wip"

==> Creating nixpkgs repo in /home/herwig/.nox/nixpkgs
==> We're in a git repo, trying to fetch it
Traceback (most recent call last):
  File "/nix/store/sqrhxqg685wvxz81ahc5si05crqj5lrm-nox-0.0.2/bin/.nox-review-wrapped", line
 12, in <module>                                                                           
    sys.exit(cli())
  File "/nix/store/dwmlgbb16ggdmshpc4d3l4mbh23scf6c-python3.4-click-6.3/lib/python3.4/site-p
ackages/click/core.py", line 716, in __call__                                              
    return self.main(*args, **kwargs)
  File "/nix/store/dwmlgbb16ggdmshpc4d3l4mbh23scf6c-python3.4-click-6.3/lib/python3.4/site-p
ackages/click/core.py", line 696, in main                                                  
    rv = self.invoke(ctx)
  File "/nix/store/dwmlgbb16ggdmshpc4d3l4mbh23scf6c-python3.4-click-6.3/lib/python3.4/site-p
ackages/click/core.py", line 1060, in invoke                                               
    return _process_result(sub_ctx.command.invoke(sub_ctx))
  File "/nix/store/dwmlgbb16ggdmshpc4d3l4mbh23scf6c-python3.4-click-6.3/lib/python3.4/site-p
ackages/click/core.py", line 889, in invoke                                                
    return ctx.invoke(self.callback, **ctx.params)
  File "/nix/store/dwmlgbb16ggdmshpc4d3l4mbh23scf6c-python3.4-click-6.3/lib/python3.4/site-p
ackages/click/core.py", line 534, in invoke                                                
    return callback(*args, **kwargs)
  File "/nix/store/dwmlgbb16ggdmshpc4d3l4mbh23scf6c-python3.4-click-6.3/lib/python3.4/site-p
ackages/click/decorators.py", line 17, in new_func                                         
    return f(get_current_context(), *args, **kwargs)
  File "/nix/store/sqrhxqg685wvxz81ahc5si05crqj5lrm-nox-0.0.2/lib/python3.4/site-packages/no
x/review.py", line 83, in wip                                                              
    attrs = differences(packages_for_sha(sha),
  File "/nix/store/0krfll6clsb40nr19lnyxac1x1x7gbwz-python3.4-dogpile.cache-0.5.4/lib/python
3.4/site-packages/dogpile/cache/region.py", line 1013, in decorate                         
    should_cache_fn)
  File "/nix/store/0krfll6clsb40nr19lnyxac1x1x7gbwz-python3.4-dogpile.cache-0.5.4/lib/python
3.4/site-packages/dogpile/cache/region.py", line 640, in get_or_create                     
    async_creator) as value:
  File "/nix/store/q06kzb3r77y2cf5ywcza64m4sg92167f-python3.4-dogpile.core-0.4.1/lib/python3
.4/site-packages/dogpile/core/dogpile.py", line 158, in __enter__                          
    return self._enter()
  File "/nix/store/q06kzb3r77y2cf5ywcza64m4sg92167f-python3.4-dogpile.core-0.4.1/lib/python3
.4/site-packages/dogpile/core/dogpile.py", line 98, in _enter                              
    generated = self._enter_create(createdtime)
  File "/nix/store/q06kzb3r77y2cf5ywcza64m4sg92167f-python3.4-dogpile.core-0.4.1/lib/python3
.4/site-packages/dogpile/core/dogpile.py", line 149, in _enter_create                      
    created = self.creator()
  File "/nix/store/0krfll6clsb40nr19lnyxac1x1x7gbwz-python3.4-dogpile.cache-0.5.4/lib/python
3.4/site-packages/dogpile/cache/region.py", line 617, in gen_value                         
    self.backend.set(key, value)
  File "/nix/store/0krfll6clsb40nr19lnyxac1x1x7gbwz-python3.4-dogpile.cache-0.5.4/lib/python
3.4/site-packages/dogpile/cache/backends/file.py", line 235, in set                        
    with self._dbm_file(True) as dbm:
  File "/nix/store/cdifdmrk87ssx6l8nblfdq08bhb39cky-python3-3.4.4/lib/python3.4/contextlib.p
y", line 59, in __enter__                                                                  
    return next(self.gen)
  File "/nix/store/0krfll6clsb40nr19lnyxac1x1x7gbwz-python3.4-dogpile.cache-0.5.4/lib/python
3.4/site-packages/dogpile/cache/backends/file.py", line 213, in _dbm_file                  
    "w" if write else "r")
  File "/nix/store/cdifdmrk87ssx6l8nblfdq08bhb39cky-python3-3.4.4/lib/python3.4/dbm/__init__
.py", line 94, in open                                                                     
    return mod.open(file, flag, mode)
_gdbm.error: [Errno 13] Permission denied