Problem with Upgrade to a newer Python version documentation

[shireenrao]

Bug description

Following the documentation on https://tljh.jupyter.org/en/latest/howto/env/user-environment.html?highlight=upgrade#upgrade-to-a-newer-python-version I created the pip_pkgs.txt file. There is an issue with file with local references. I don't think this is tljh issue. It must be an upstream issue.

alembic==1.7.5
anyio==3.3.4
argon2-cffi==21.1.0
async-generator==1.10
attrs==21.2.0
Babel==2.9.1
backcall==0.2.0
bleach==4.1.0
brotlipy==0.7.0
certifi==2021.10.8
certipy==0.1.3
cffi @ file:///home/conda/feedstock_root/build_artifacts/cffi_1631636437015/work
chardet @ file:///home/conda/feedstock_root/build_artifacts/chardet_1610093554058/work
charset-normalizer @ file:///home/conda/feedstock_root/build_artifacts/charset-normalizer_1626371162869/work
colorama @ file:///home/conda/feedstock_root/build_artifacts/colorama_1602866480661/work
conda==4.10.3
conda-package-handling @ file:///drone/src/build_artifacts/conda-package-handling_1618231463295/work
cryptography @ file:///drone/src/build_artifacts/cryptography_1633993741744/work
debugpy==1.5.1
decorator==5.1.0
defusedxml==0.7.1
entrypoints==0.3
greenlet==1.1.2
idna @ file:///home/conda/feedstock_root/build_artifacts/idna_1609836280497/work
ipykernel==6.5.0
ipython==7.29.0
ipython-genutils==0.2.0
ipywidgets==7.6.5
jedi==0.18.0
Jinja2==3.0.3
json5==0.9.6
jsonschema==4.2.1
jupyter-client==7.0.6
jupyter-core==4.9.1
jupyter-resource-usage==0.6.0
jupyter-server==1.11.2
jupyter-telemetry==0.1.0
jupyterhub==1.5.0
jupyterlab==3.2.3
jupyterlab-pygments==0.1.2
jupyterlab-server==2.8.2
jupyterlab-widgets==1.0.2
Mako==1.1.5
mamba @ file:///drone/src/build_artifacts/mamba_1632784649415/work
MarkupSafe==2.0.1
matplotlib-inline==0.1.3
mistune==0.8.4
nbclassic==0.3.4
nbclient==0.5.5
nbconvert==6.2.0
nbformat==5.1.3
nbgitpuller==1.0.2
nest-asyncio==1.5.1
notebook==6.4.5
nteract-on-jupyter==2.1.3
oauthlib==3.1.1
packaging==21.2
pamela==1.0.0
pandocfilters==1.5.0
parso==0.8.2
pexpect==4.8.0
pickleshare==0.7.5
prometheus-client==0.12.0
prompt-toolkit==3.0.22
psutil==5.8.0
ptyprocess==0.7.0
pycosat @ file:///drone/src/build_artifacts/pycosat_1610104067948/work
pycparser @ file:///home/conda/feedstock_root/build_artifacts/pycparser_1593275161868/work
Pygments==2.10.0
pyOpenSSL @ file:///home/conda/feedstock_root/build_artifacts/pyopenssl_1633192417276/work
pyparsing==2.4.7
pyrsistent==0.18.0
PySocks @ file:///home/conda/feedstock_root/build_artifacts/pysocks_1610291551581/work
python-dateutil==2.8.2
python-json-logger==2.0.2
pytz==2021.3
pyzmq==22.3.0
requests @ file:///home/conda/feedstock_root/build_artifacts/requests_1626393743643/work
ruamel-yaml-conda @ file:///drone/src/build_artifacts/ruamel_yaml_1611944123344/work
ruamel.yaml==0.17.17
ruamel.yaml.clib==0.2.6
Send2Trash==1.8.0
six @ file:///home/conda/feedstock_root/build_artifacts/six_1620240208055/work
sniffio==1.2.0
SQLAlchemy==1.4.27
terminado==0.12.1
testpath==0.5.0
tornado==6.1
tqdm @ file:///home/conda/feedstock_root/build_artifacts/tqdm_1632160078689/work
traitlets==5.1.1
urllib3 @ file:///home/conda/feedstock_root/build_artifacts/urllib3_1632350318291/work
wcwidth==0.2.5
webencodings==0.5.1
websocket-client==1.2.1
widgetsnbextension==3.5.2q

Expected behaviour

The local references should not have been there.

Actual behaviour

We should not see local file references

How to reproduce

Follow the directions in https://tljh.jupyter.org/en/latest/howto/env/user-environment.html?highlight=upgrade#upgrade-to-a-newer-python-version and check the file pip_pkgs.txt

Your personal set up

• OS: ubuntu 20.04
• Version(s):

Selected Jupyter core packages... IPython : 7.29.0 ipykernel : 6.5.0 ipywidgets : 7.6.5 jupyter_client : 7.0.6 jupyter_core : 4.9.1 jupyter_server : 1.11.2 jupyterlab : 3.2.3 nbclient : 0.5.5 nbconvert : 6.2.0 nbformat : 5.1.3 notebook : 6.4.5 qtconsole : not installed traitlets : 5.1.1

Python 3.9.7

• Full environment

# paste output of `pip freeze` or `conda list` here

• Configuration

# jupyterhub_config.py

• Logs

# paste relevant logs here, if any

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[manics]

This looks like an error in the docs. pip freeze is run in a conda environment, so it's incorrectly listing conda packages which will then fail when you run pip install -r pip_pkgs.txt. You might need to edit the output of pip freeze to exclude all conda packages.

[shireenrao]

For what its worth, this used to work a couple of months ago. I used to just have to comment out the two lines from pip_pkgs.txt

conda==4.10.3
conda-package-handling @ file:///drone/src/build_artifacts/conda-package-handling_1618231463295/work

As you mentioned these are the two conda packages. The rest are regular python packages. If you look at the listing I showed above it is also affecting non conda packages. For example, look at requests

requests @ file:///home/conda/feedstock_root/build_artifacts/requests_1626393743643/work

Should I open a ticket with conda about this?

[manics]

I don't think it's a conda bug, it sounds like you've got a mix of conda and pip packages. Depending on the order you've installed things they may override each other. For example if you install requests with conda but subsequently upgrade it with pip or vice-versa, either directly or as a transitive dependency of another package, you'll get different results.

[shireenrao]

@manics - this is after a fresh install of tljh on an aws ec2 Instance. Here are the steps I took:

1. Provision the AWS EC2 instance.
2. Login as ubuntu user and run the tljh install script.
3. Reboot the instance and login as ubuntu user again.
4. Sudo as root user and activate base environment by sourcing /opt/tljh/user/bin/activate.
5. Run pip freeze redirected to pip_pkgs.txt

Hope that helps.

[shireenrao]

I did a manual install of anaconda on a newly provisioned ubuntu box.

(base) ubuntu@ip-11-0-1-206:~$ history
1  wget https://repo.anaconda.com/archive/Anaconda3-2021.05-Linux-x86_64.sh
2  bash Anaconda3-2021.05-Linux-x86_64.sh
3  pip free
4  pip freeze

This is the output of pip freeze:

alabaster @ file:///home/ktietz/src/ci/alabaster_1611921544520/work
anaconda-client==1.7.2
anaconda-navigator==2.0.3
anaconda-project @ file:///tmp/build/80754af9/anaconda-project_1610472525955/work
anyio @ file:///tmp/build/80754af9/anyio_1617783275907/work/dist
appdirs==1.4.4
argh==0.26.2
argon2-cffi @ file:///tmp/build/80754af9/argon2-cffi_1613037097816/work
asn1crypto @ file:///tmp/build/80754af9/asn1crypto_1596577642040/work
astroid @ file:///tmp/build/80754af9/astroid_1613500854201/work
astropy @ file:///tmp/build/80754af9/astropy_1617745353437/work
async-generator @ file:///home/ktietz/src/ci/async_generator_1611927993394/work
atomicwrites==1.4.0
attrs @ file:///tmp/build/80754af9/attrs_1604765588209/work
autopep8 @ file:///tmp/build/80754af9/autopep8_1615918855173/work
Babel @ file:///tmp/build/80754af9/babel_1607110387436/work
backcall @ file:///home/ktietz/src/ci/backcall_1611930011877/work
backports.functools-lru-cache @ file:///tmp/build/80754af9/backports.functools_lru_cache_1618170165463/work
backports.shutil-get-terminal-size @ file:///tmp/build/80754af9/backports.shutil_get_terminal_size_1608222128777/work
backports.tempfile @ file:///home/linux1/recipes/ci/backports.tempfile_1610991236607/work
backports.weakref==1.0.post1
beautifulsoup4 @ file:///home/linux1/recipes/ci/beautifulsoup4_1610988766420/work
bitarray @ file:///tmp/build/80754af9/bitarray_1620827551536/work
bkcharts==0.2
black==19.10b0
bleach @ file:///tmp/build/80754af9/bleach_1612211392645/work
bokeh @ file:///tmp/build/80754af9/bokeh_1620779595936/work
boto==2.49.0
Bottleneck==1.3.2
brotlipy==0.7.0
certifi==2020.12.5
cffi @ file:///tmp/build/80754af9/cffi_1613246945912/work
chardet @ file:///tmp/build/80754af9/chardet_1607706746162/work
click @ file:///home/linux1/recipes/ci/click_1610990599742/work
cloudpickle @ file:///tmp/build/80754af9/cloudpickle_1598884132938/work
clyent==1.2.2
colorama @ file:///tmp/build/80754af9/colorama_1607707115595/work
conda==4.10.1
conda-build==3.21.4
conda-content-trust @ file:///tmp/build/80754af9/conda-content-trust_1617045594566/work
conda-package-handling @ file:///tmp/build/80754af9/conda-package-handling_1618262148928/work
conda-repo-cli @ file:///tmp/build/80754af9/conda-repo-cli_1620168426516/work
conda-token @ file:///tmp/build/80754af9/conda-token_1620076980546/work
conda-verify==3.4.2
contextlib2==0.6.0.post1
cryptography @ file:///tmp/build/80754af9/cryptography_1616769286105/work
cycler==0.10.0
Cython @ file:///tmp/build/80754af9/cython_1618435160151/work
cytoolz==0.11.0
dask @ file:///tmp/build/80754af9/dask-core_1617390489108/work
decorator @ file:///tmp/build/80754af9/decorator_1617916966915/work
defusedxml @ file:///tmp/build/80754af9/defusedxml_1615228127516/work
diff-match-patch @ file:///tmp/build/80754af9/diff-match-patch_1594828741838/work
distributed @ file:///tmp/build/80754af9/distributed_1620902833129/work
docutils @ file:///tmp/build/80754af9/docutils_1620827984873/work
entrypoints==0.3
et-xmlfile==1.0.1
fastcache==1.1.0
filelock @ file:///home/linux1/recipes/ci/filelock_1610993975404/work
flake8 @ file:///tmp/build/80754af9/flake8_1615834841867/work
Flask @ file:///home/ktietz/src/ci/flask_1611932660458/work
fsspec @ file:///tmp/build/80754af9/fsspec_1617959894824/work
future==0.18.2
gevent @ file:///tmp/build/80754af9/gevent_1616770671827/work
glob2 @ file:///home/linux1/recipes/ci/glob2_1610991677669/work
gmpy2==2.0.8
greenlet @ file:///tmp/build/80754af9/greenlet_1611957705398/work
h5py==2.10.0
HeapDict==1.0.1
html5lib @ file:///tmp/build/80754af9/html5lib_1593446221756/work
idna @ file:///home/linux1/recipes/ci/idna_1610986105248/work
imageio @ file:///tmp/build/80754af9/imageio_1617700267927/work
imagesize @ file:///home/ktietz/src/ci/imagesize_1611921604382/work
importlib-metadata @ file:///tmp/build/80754af9/importlib-metadata_1617874469820/work
iniconfig @ file:///home/linux1/recipes/ci/iniconfig_1610983019677/work
intervaltree @ file:///tmp/build/80754af9/intervaltree_1598376443606/work
ipykernel @ file:///tmp/build/80754af9/ipykernel_1596207638929/work/dist/ipykernel-5.3.4-py3-none-any.whl
ipython @ file:///tmp/build/80754af9/ipython_1617120885885/work
ipython-genutils @ file:///tmp/build/80754af9/ipython_genutils_1606773439826/work
ipywidgets @ file:///tmp/build/80754af9/ipywidgets_1610481889018/work
isort @ file:///tmp/build/80754af9/isort_1616355431277/work
itsdangerous @ file:///home/ktietz/src/ci/itsdangerous_1611932585308/work
jdcal==1.4.1
jedi @ file:///tmp/build/80754af9/jedi_1606932564285/work
jeepney @ file:///tmp/build/80754af9/jeepney_1606148855031/work
Jinja2 @ file:///tmp/build/80754af9/jinja2_1612213139570/work
joblib @ file:///tmp/build/80754af9/joblib_1613502643832/work
json5==0.9.5
jsonschema @ file:///tmp/build/80754af9/jsonschema_1602607155483/work
jupyter==1.0.0
jupyter-client @ file:///tmp/build/80754af9/jupyter_client_1616770841739/work
jupyter-console @ file:///tmp/build/80754af9/jupyter_console_1616615302928/work
jupyter-core @ file:///tmp/build/80754af9/jupyter_core_1612213311222/work
jupyter-packaging @ file:///tmp/build/80754af9/jupyter-packaging_1613502826984/work
jupyter-server @ file:///tmp/build/80754af9/jupyter_server_1616083640759/work
jupyterlab @ file:///tmp/build/80754af9/jupyterlab_1619133235951/work
jupyterlab-pygments @ file:///tmp/build/80754af9/jupyterlab_pygments_1601490720602/work
jupyterlab-server @ file:///tmp/build/80754af9/jupyterlab_server_1617134334258/work
jupyterlab-widgets @ file:///tmp/build/80754af9/jupyterlab_widgets_1609884341231/work
keyring @ file:///tmp/build/80754af9/keyring_1614616740399/work
kiwisolver @ file:///tmp/build/80754af9/kiwisolver_1612282420641/work
lazy-object-proxy @ file:///tmp/build/80754af9/lazy-object-proxy_1616526917483/work
libarchive-c @ file:///tmp/build/80754af9/python-libarchive-c_1617780486945/work
llvmlite==0.36.0
locket==0.2.1
lxml @ file:///tmp/build/80754af9/lxml_1616443220220/work
MarkupSafe==1.1.1
matplotlib @ file:///tmp/build/80754af9/matplotlib-suite_1613407855456/work
mccabe==0.6.1
mistune==0.8.4
mkl-fft==1.3.0
mkl-random @ file:///tmp/build/80754af9/mkl_random_1618853849286/work
mkl-service==2.3.0
mock @ file:///tmp/build/80754af9/mock_1607622725907/work
more-itertools @ file:///tmp/build/80754af9/more-itertools_1613676688952/work
mpmath==1.2.1
msgpack @ file:///tmp/build/80754af9/msgpack-python_1612287151062/work
multipledispatch==0.6.0
mypy-extensions==0.4.3
navigator-updater==0.2.1
nbclassic @ file:///tmp/build/80754af9/nbclassic_1616085367084/work
nbclient @ file:///tmp/build/80754af9/nbclient_1614364831625/work
nbconvert @ file:///tmp/build/80754af9/nbconvert_1601914830498/work
nbformat @ file:///tmp/build/80754af9/nbformat_1617383369282/work
nest-asyncio @ file:///tmp/build/80754af9/nest-asyncio_1613680548246/work
networkx @ file:///tmp/build/80754af9/networkx_1598376031484/work
nltk @ file:///tmp/build/80754af9/nltk_1618327084230/work
nose @ file:///tmp/build/80754af9/nose_1606773131901/work
notebook @ file:///tmp/build/80754af9/notebook_1616443462982/work
numba @ file:///tmp/build/80754af9/numba_1616774046117/work
numexpr @ file:///tmp/build/80754af9/numexpr_1618856167419/work
numpy @ file:///tmp/build/80754af9/numpy_and_numpy_base_1618497241363/work
numpydoc @ file:///tmp/build/80754af9/numpydoc_1605117425582/work
olefile==0.46
openpyxl @ file:///tmp/build/80754af9/openpyxl_1615411699337/work
packaging @ file:///tmp/build/80754af9/packaging_1611952188834/work
pandas==1.2.4
pandocfilters @ file:///tmp/build/80754af9/pandocfilters_1605120460739/work
parso==0.7.0
partd @ file:///tmp/build/80754af9/partd_1618000087440/work
path @ file:///tmp/build/80754af9/path_1614022220526/work
pathlib2 @ file:///tmp/build/80754af9/pathlib2_1607024983162/work
pathspec==0.7.0
patsy==0.5.1
pep8==1.7.1
pexpect @ file:///tmp/build/80754af9/pexpect_1605563209008/work
pickleshare @ file:///tmp/build/80754af9/pickleshare_1606932040724/work
Pillow @ file:///tmp/build/80754af9/pillow_1617383569452/work
pkginfo==1.7.0
pluggy @ file:///tmp/build/80754af9/pluggy_1615976321666/work
ply==3.11
prometheus-client @ file:///tmp/build/80754af9/prometheus_client_1618088486455/work
prompt-toolkit @ file:///tmp/build/80754af9/prompt-toolkit_1616415428029/work
psutil @ file:///tmp/build/80754af9/psutil_1612298023621/work
ptyprocess @ file:///tmp/build/80754af9/ptyprocess_1609355006118/work/dist/ptyprocess-0.7.0-py2.py3-none-any.whl
py @ file:///tmp/build/80754af9/py_1607971587848/work
pycodestyle @ file:///home/ktietz/src/ci_mi/pycodestyle_1612807597675/work
pycosat==0.6.3
pycparser @ file:///tmp/build/80754af9/pycparser_1594388511720/work
pycurl==7.43.0.6
pydocstyle @ file:///tmp/build/80754af9/pydocstyle_1616182067796/work
pyerfa @ file:///tmp/build/80754af9/pyerfa_1619390903914/work
pyflakes @ file:///home/ktietz/src/ci_ipy2/pyflakes_1612551159640/work
Pygments @ file:///tmp/build/80754af9/pygments_1615143339740/work
pylint @ file:///tmp/build/80754af9/pylint_1617135829881/work
pyls-black @ file:///tmp/build/80754af9/pyls-black_1607553132291/work
pyls-spyder @ file:///tmp/build/80754af9/pyls-spyder_1613849700860/work
pyodbc===4.0.0-unsupported
pyOpenSSL @ file:///tmp/build/80754af9/pyopenssl_1608057966937/work
pyparsing @ file:///home/linux1/recipes/ci/pyparsing_1610983426697/work
pyrsistent @ file:///tmp/build/80754af9/pyrsistent_1600141720057/work
PySocks @ file:///tmp/build/80754af9/pysocks_1605305779399/work
pytest==6.2.3
python-dateutil @ file:///home/ktietz/src/ci/python-dateutil_1611928101742/work
python-jsonrpc-server @ file:///tmp/build/80754af9/python-jsonrpc-server_1600278539111/work
python-language-server @ file:///tmp/build/80754af9/python-language-server_1607972495879/work
pytz @ file:///tmp/build/80754af9/pytz_1612215392582/work
PyWavelets @ file:///tmp/build/80754af9/pywavelets_1601658317819/work
pyxdg @ file:///tmp/build/80754af9/pyxdg_1603822279816/work
PyYAML==5.4.1
pyzmq==20.0.0
QDarkStyle==2.8.1
QtAwesome @ file:///tmp/build/80754af9/qtawesome_1615991616277/work
qtconsole @ file:///tmp/build/80754af9/qtconsole_1616775094278/work
QtPy==1.9.0
regex @ file:///tmp/build/80754af9/regex_1617569202463/work
requests @ file:///tmp/build/80754af9/requests_1608241421344/work
rope @ file:///tmp/build/80754af9/rope_1602264064449/work
Rtree @ file:///tmp/build/80754af9/rtree_1618420845272/work
ruamel-yaml-conda @ file:///tmp/build/80754af9/ruamel_yaml_1616016699510/work
scikit-image==0.18.1
scikit-learn @ file:///tmp/build/80754af9/scikit-learn_1614446682169/work
scipy @ file:///tmp/build/80754af9/scipy_1618855647378/work
seaborn @ file:///tmp/build/80754af9/seaborn_1608578541026/work
SecretStorage @ file:///tmp/build/80754af9/secretstorage_1614022784285/work
Send2Trash @ file:///tmp/build/80754af9/send2trash_1607525499227/work
simplegeneric==0.8.1
singledispatch @ file:///tmp/build/80754af9/singledispatch_1614366001199/work
sip==4.19.13
six @ file:///tmp/build/80754af9/six_1605205327372/work
sniffio @ file:///tmp/build/80754af9/sniffio_1614030475067/work
snowballstemmer @ file:///tmp/build/80754af9/snowballstemmer_1611258885636/work
sortedcollections @ file:///tmp/build/80754af9/sortedcollections_1611172717284/work
sortedcontainers @ file:///tmp/build/80754af9/sortedcontainers_1606865132123/work
soupsieve @ file:///tmp/build/80754af9/soupsieve_1616183228191/work
Sphinx @ file:///tmp/build/80754af9/sphinx_1620777493457/work
sphinxcontrib-applehelp @ file:///home/ktietz/src/ci/sphinxcontrib-applehelp_1611920841464/work
sphinxcontrib-devhelp @ file:///home/ktietz/src/ci/sphinxcontrib-devhelp_1611920923094/work
sphinxcontrib-htmlhelp @ file:///home/ktietz/src/ci/sphinxcontrib-htmlhelp_1611920974801/work
sphinxcontrib-jsmath @ file:///home/ktietz/src/ci/sphinxcontrib-jsmath_1611920942228/work
sphinxcontrib-qthelp @ file:///home/ktietz/src/ci/sphinxcontrib-qthelp_1611921055322/work
sphinxcontrib-serializinghtml @ file:///home/ktietz/src/ci/sphinxcontrib-serializinghtml_1611920755253/work
sphinxcontrib-websupport @ file:///tmp/build/80754af9/sphinxcontrib-websupport_1597081412696/work
spyder @ file:///tmp/build/80754af9/spyder_1616775618138/work
spyder-kernels @ file:///tmp/build/80754af9/spyder-kernels_1614030590686/work
SQLAlchemy @ file:///tmp/build/80754af9/sqlalchemy_1620712430742/work
statsmodels @ file:///tmp/build/80754af9/statsmodels_1614023746358/work
sympy @ file:///tmp/build/80754af9/sympy_1618252284338/work
tables==3.6.1
tblib @ file:///tmp/build/80754af9/tblib_1597928476713/work
terminado==0.9.4
testpath @ file:///home/ktietz/src/ci/testpath_1611930608132/work
textdistance @ file:///tmp/build/80754af9/textdistance_1612461398012/work
threadpoolctl @ file:///tmp/tmp9twdgx9k/threadpoolctl-2.1.0-py3-none-any.whl
three-merge @ file:///tmp/build/80754af9/three-merge_1607553261110/work
tifffile==2020.10.1
toml @ file:///tmp/build/80754af9/toml_1616166611790/work
toolz @ file:///home/linux1/recipes/ci/toolz_1610987900194/work
tornado @ file:///tmp/build/80754af9/tornado_1606942300299/work
tqdm @ file:///tmp/build/80754af9/tqdm_1615925068909/work
traitlets @ file:///home/ktietz/src/ci/traitlets_1611929699868/work
typed-ast @ file:///tmp/build/80754af9/typed-ast_1610484547928/work
typing-extensions @ file:///home/ktietz/src/ci_mi/typing_extensions_1612808209620/work
ujson @ file:///tmp/build/80754af9/ujson_1611259522456/work
unicodecsv==0.14.1
urllib3 @ file:///tmp/build/80754af9/urllib3_1615837158687/work
watchdog @ file:///tmp/build/80754af9/watchdog_1612471027849/work
wcwidth @ file:///tmp/build/80754af9/wcwidth_1593447189090/work
webencodings==0.5.1
Werkzeug @ file:///home/ktietz/src/ci/werkzeug_1611932622770/work
widgetsnbextension==3.5.1
wrapt==1.12.1
wurlitzer @ file:///tmp/build/80754af9/wurlitzer_1617224664226/work
xlrd @ file:///tmp/build/80754af9/xlrd_1608072521494/work
XlsxWriter @ file:///tmp/build/80754af9/xlsxwriter_1617224712951/work
xlwt==1.3.0
xmltodict==0.12.0
yapf @ file:///tmp/build/80754af9/yapf_1615749224965/work
zict==2.0.0
zipp @ file:///tmp/build/80754af9/zipp_1615904174917/work
zope.event==4.5.0
zope.interface @ file:///tmp/build/80754af9/zope.interface_1616357211867/work

[aolney]

This just hit me. Here's an SO suggestion:

pip list --format=freeze > requirements.txt

https://stackoverflow.com/questions/62863020/pip-freeze-generating-file-on-conda-environment https://stackoverflow.com/questions/62586878/why-does-the-pip-requirements-file-contain-file-instead-of-version-number/62589814#62589814

[bigpick]

This is fixed as a sideffect of https://github.com/jupyterhub/the-littlest-jupyterhub/pull/825