How to fix locking failed in pipenv?

Here are my debugging notes. Still not sure which package is causing the problem, but this does seem to fix it.

The error you get when you first run pipenv install with pipenv version 2020.8.13.

Traceback (most recent call last):  File "/usr/local/bin/pipenv", line 8, in <module>    sys.exit(cli())  File "/usr/local/lib/python3.6/site-packages/pipenv/vendor/click/core.py", line 829, in __call__    return self.main(*args, **kwargs)  File "/usr/local/lib/python3.6/site-packages/pipenv/vendor/click/core.py", line 782, in main    rv = self.invoke(ctx)  File "/usr/local/lib/python3.6/site-packages/pipenv/vendor/click/core.py", line 1259, in invoke    return _process_result(sub_ctx.command.invoke(sub_ctx))  File "/usr/local/lib/python3.6/site-packages/pipenv/vendor/click/core.py", line 1066, in invoke    return ctx.invoke(self.callback, **ctx.params)  File "/usr/local/lib/python3.6/site-packages/pipenv/vendor/click/core.py", line 610, in invoke    return callback(*args, **kwargs)  File "/usr/local/lib/python3.6/site-packages/pipenv/vendor/click/decorators.py", line 73, in new_func    return ctx.invoke(f, obj, *args, **kwargs)  File "/usr/local/lib/python3.6/site-packages/pipenv/vendor/click/core.py", line 610, in invoke    return callback(*args, **kwargs)  File "/usr/local/lib/python3.6/site-packages/pipenv/vendor/click/decorators.py", line 21, in new_func    return f(get_current_context(), *args, **kwargs)  File "/usr/local/lib/python3.6/site-packages/pipenv/cli/command.py", line 252, in install    site_packages=state.site_packages  File "/usr/local/lib/python3.6/site-packages/pipenv/core.py", line 1928, in do_install    site_packages=site_packages,  File "/usr/local/lib/python3.6/site-packages/pipenv/core.py", line 580, in ensure_project    pypi_mirror=pypi_mirror,  File "/usr/local/lib/python3.6/site-packages/pipenv/core.py", line 512, in ensure_virtualenv    python=python, site_packages=site_packages, pypi_mirror=pypi_mirror  File "/usr/local/lib/python3.6/site-packages/pipenv/core.py", line 999, in do_create_virtualenv    project._environment.add_dist("pipenv")  File "/usr/local/lib/python3.6/site-packages/pipenv/environment.py", line 135, in add_dist    self.extend_dists(dist)  File "/usr/local/lib/python3.6/site-packages/pipenv/environment.py", line 127, in extend_dists    extras = self.resolve_dist(dist, self.base_working_set)  File "/usr/local/lib/python3.6/site-packages/pipenv/environment.py", line 122, in resolve_dist    deps |= cls.resolve_dist(dist, working_set)  File "/usr/local/lib/python3.6/site-packages/pipenv/environment.py", line 121, in resolve_dist    dist = working_set.find(req)  File "/usr/local/lib/python3.6/site-packages/pkg_resources/__init__.py", line 642, in find    raise VersionConflict(dist, req)pkg_resources.VersionConflict: (importlib-metadata 2.0.0 (/usr/local/lib/python3.6/site-packages), Requirement.parse('importlib-metadata<2,>=0.12; python_version < "3.8"'))

If you run pip install -U pipenv it seems to change the importlib-metadata version:

Installing collected packages: importlib-metadata  Attempting uninstall: importlib-metadata    Found existing installation: importlib-metadata 2.0.0    Uninstalling importlib-metadata-2.0.0:      Successfully uninstalled importlib-metadata-2.0.0Successfully installed importlib-metadata-1.7.0

Now if you run pipenv install -d --skip-lock it will finish. It seems like a library is requiring a version >= importlib-metadata 2.0.

When I pinned the following dependencies it didn't work at first when running pipenv lock, however, if I removed the lock file (rm Pipenv.lock) then it worked when I ran pipenv lock again.

virtualenv = "==20.0.31"importlib-metadata = "==1.7.0"

Try to remove Pipefile.lock before installing a package