virtualenv: pip install virtualenv broken / missing zipp package

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If submitting a BUG please provide:

• Minimal reproducible example or detailed descriptions
• the output of the virtual environment creation with the -vvv --with-traceback flags included
• pip list of the environment where virtualenv is installed into if not using the zipapp

I’ve created a minimal reproducible Dockerfile, it’s self explanatory:

FROM ubuntu:16.04

RUN apt-get update && apt-get install -y --no-install-recommends \
    python python-pip python-pkg-resources python-setuptools python-wheel python-dev libxslt1-dev
RUN pip install virtualenv --disable-pip-version-check --no-cache-dir


WORKDIR /root
RUN virtualenv venv

Full install log:

UN pip install virtualenv --disable-pip-version-check --no-cache-dir
 ---> Running in 92fa3d30b758
Collecting virtualenv
  Downloading https://files.pythonhosted.org/packages/a3/dd/e43866ac0d25cd1ecbde0814f6cd7372ea257fbdf443dc9f0a01740da93d/virtualenv-20.0.4-py2.py3-none-any.whl (4.6MB)
Collecting six<2,>=1.9.0 (from virtualenv)
  Downloading https://files.pythonhosted.org/packages/65/eb/1f97cb97bfc2390a276969c6fae16075da282f5058082d4cb10c6c5c1dba/six-1.14.0-py2.py3-none-any.whl
Collecting distlib<1,>=0.3.0 (from virtualenv)
  Downloading https://files.pythonhosted.org/packages/7d/29/694a3a4d7c0e1aef76092e9167fbe372e0f7da055f5dcf4e1313ec21d96a/distlib-0.3.0.zip (571kB)
Collecting importlib-metadata<2,>=0.12; python_version < "3.8" (from virtualenv)
  Downloading https://files.pythonhosted.org/packages/8b/03/a00d504808808912751e64ccf414be53c29cad620e3de2421135fcae3025/importlib_metadata-1.5.0-py2.py3-none-any.whl
Collecting appdirs<2,>=1.4.3 (from virtualenv)
  Downloading https://files.pythonhosted.org/packages/56/eb/810e700ed1349edde4cbdc1b2a21e28cdf115f9faf263f6bbf8447c1abf3/appdirs-1.4.3-py2.py3-none-any.whl
Collecting importlib-resources<2,>=1.0; python_version < "3.7" (from virtualenv)
  Downloading https://files.pythonhosted.org/packages/2f/f7/b4aa02cdd3ee7ebba375969d77c00826aa15c5db84247d23c89522dccbfa/importlib_resources-1.0.2-py2.py3-none-any.whl
Collecting filelock<4,>=3.0.0 (from virtualenv)
  Downloading https://files.pythonhosted.org/packages/14/ec/6ee2168387ce0154632f856d5cc5592328e9cf93127c5c9aeca92c8c16cb/filelock-3.0.12.tar.gz
Collecting contextlib2<1,>=0.6.0; python_version < "3.3" (from virtualenv)
  Downloading https://files.pythonhosted.org/packages/85/60/370352f7ef6aa96c52fb001831622f50f923c1d575427d021b8ab3311236/contextlib2-0.6.0.post1-py2.py3-none-any.whl
Collecting pathlib2<3,>=2.3.3; python_version < "3.4" and sys_platform != "win32" (from virtualenv)
  Downloading https://files.pythonhosted.org/packages/e9/45/9c82d3666af4ef9f221cbb954e1d77ddbb513faf552aea6df5f37f1a4859/pathlib2-2.3.5-py2.py3-none-any.whl
Collecting zipp>=0.5 (from importlib-metadata<2,>=0.12; python_version < "3.8"->virtualenv)
  Downloading https://files.pythonhosted.org/packages/60/85/668bca4a9ef474ca634c993e768f12bd99af1f06bb90bb2655bc538a967e/zipp-2.2.0.tar.gz
  Running setup.py (path:/tmp/pip-build-pW7K_Y/zipp/setup.py) egg_info for package zipp produced metadata for project name unknown. Fix your #egg=zipp fragments.
Collecting configparser>=3.5; python_version < "3" (from importlib-metadata<2,>=0.12; python_version < "3.8"->virtualenv)
  Downloading https://files.pythonhosted.org/packages/7a/2a/95ed0501cf5d8709490b1d3a3f9b5cf340da6c433f896bbe9ce08dbe6785/configparser-4.0.2-py2.py3-none-any.whl
Collecting typing; python_version < "3.5" (from importlib-resources<2,>=1.0; python_version < "3.7"->virtualenv)
  Downloading https://files.pythonhosted.org/packages/22/30/64ca29543375759dc589ade14a6cd36382abf2bec17d67de8481bc9814d7/typing-3.7.4.1-py2-none-any.whl
Collecting scandir; python_version < "3.5" (from pathlib2<3,>=2.3.3; python_version < "3.4" and sys_platform != "win32"->virtualenv)
  Downloading https://files.pythonhosted.org/packages/df/f5/9c052db7bd54d0cbf1bc0bb6554362bba1012d03e5888950a4f5c5dadc4e/scandir-1.10.0.tar.gz
Installing collected packages: six, distlib, contextlib2, unknown, scandir, pathlib2, configparser, importlib-metadata, appdirs, typing, importlib-resources, filelock, virtualenv
  Running setup.py install for distlib: started
    Running setup.py install for distlib: finished with status 'done'
  Running setup.py install for unknown: started
    Running setup.py install for unknown: finished with status 'done'
  Running setup.py install for scandir: started
    Running setup.py install for scandir: finished with status 'done'
  Running setup.py install for filelock: started
    Running setup.py install for filelock: finished with status 'done'
Successfully installed appdirs-1.4.3 configparser-4.0.2 contextlib2-0.6.0.post1 distlib-0.3.0 filelock-3.0.12 importlib-metadata-1.5.0 importlib-resources-1.0.2 pathlib2-2.3.5 scandir-1.10.0 six-1.14.0 typing-3.7.4.1 unknown-0.0.0 virtualenv-20.0.4
Removing intermediate container 92fa3d30b758
 ---> 6127ebfdaa58
Step 5/6 : WORKDIR /root
 ---> Running in 3998fd059d5e
Removing intermediate container 3998fd059d5e
 ---> 62a1db87d19c
Step 6/6 : RUN virtualenv venv
 ---> Running in c40b1478666a
Traceback (most recent call last):
  File "/usr/local/bin/virtualenv", line 7, in <module>
    from virtualenv.__main__ import run_with_catch
  File "/usr/local/lib/python2.7/dist-packages/virtualenv/__init__.py", line 3, in <module>
    from .run import cli_run
  File "/usr/local/lib/python2.7/dist-packages/virtualenv/run/__init__.py", line 9, in <module>
    from .plugin.activators import ActivationSelector
  File "/usr/local/lib/python2.7/dist-packages/virtualenv/run/plugin/activators.py", line 6, in <module>
    from .base import ComponentBuilder
  File "/usr/local/lib/python2.7/dist-packages/virtualenv/run/plugin/base.py", line 9, in <module>
    from importlib_metadata import entry_points
  File "/usr/local/lib/python2.7/dist-packages/importlib_metadata/__init__.py", line 9, in <module>
    import zipp
ImportError: No module named zipp
The command '/bin/sh -c virtualenv venv' returned a non-zero code: 1