Could not find a version that satisfies the requirement pyyaml>=5.3, but PyYAML is version 5.3.1

Question

I am using SetupTools to build a package of my own. In INSTALL_REQUIRES in setup.py I have the following dependencies:

...
INSTALL_REQUIRES = [
    'ray>=0.8.7',
    'pyyaml>=5.3',
]

setup(name=PACKAGE_NAME,
      version=VERSION,
      description=DESCRIPTION,
      long_description=LONG_DESCRIPTION,
      long_description_content_type=LONG_DESC_TYPE,
      author=AUTHOR,
      license=LICENSE,
      author_email=AUTHOR_EMAIL,
      url=URL,
      install_requires=INSTALL_REQUIRES,
      packages=find_packages()
      )

When I run pip3 install -i https://test.pypi.org/simple/ r3po==0.0.6, I get the following error:

ERROR: Could not find a version that satisfies the requirement pyyaml>=5.3 (from r3po==0.0.6) (from versions: 3.11)
ERROR: No matching distribution found for pyyaml>=5.3 (from r3po==0.0.6)

However, pip3 search pyyaml shows me that PyYAML is definitely there:

PyYAML (5.3.1) - YAML parser and emitter for Python

and pip3 install pyyaml (in a .venv that has pyyaml installed) gives

Requirement already satisfied: pyyaml in /home/lieu/dev/inzura-clustering-project/.venv/lib/python3.8/site-packages (5.3.1)

And before you ask --- yes, I've tried all combinations of PyYAML, pyyaml, 5.3.1, 5.3, and so on, but nothing has worked. I even tried to remove the version requirement (so INSTALL_REQUIRES=['ray>=0.87','pyyaml']) but this leads to another error:

ERROR: Command errored out with exit status 1:
command: /home/lieu/dev/r3po/sample/.venv/bin/python3 -c 'import sys, setuptools, tokenize; sys.argv[0] = '"'"'/tmp/pip-install-w32z04mo/pyyaml/setup.py'"'"'; __file__='"'"'/tmp/pip-install-w32z04mo/pyyaml/setup.py'"'"';f=getattr(tokenize, '"'"'open'"'"', open)(__file__);code=f.read().replace('"'"'\r\n'"'"', '"'"'\n'"'"');f.close();exec(compile(code, __file__, '"'"'exec'"'"'))' egg_info --egg-base /tmp/pip-install-w32z04mo/pyyaml/pip-egg-info
         cwd: /tmp/pip-install-w32z04mo/pyyaml/
    Complete output (7 lines):
    running egg_info
    creating /tmp/pip-install-w32z04mo/pyyaml/pip-egg-info/PyYAML.egg-info
    writing /tmp/pip-install-w32z04mo/pyyaml/pip-egg-info/PyYAML.egg-info/PKG-INFO
    writing dependency_links to /tmp/pip-install-w32z04mo/pyyaml/pip-egg-info/PyYAML.egg-info/dependency_links.txt
    writing top-level names to /tmp/pip-install-w32z04mo/pyyaml/pip-egg-info/PyYAML.egg-info/top_level.txt
    writing manifest file '/tmp/pip-install-w32z04mo/pyyaml/pip-egg-info/PyYAML.egg-info/SOURCES.txt'
    error: package directory 'lib3/yaml' does not exist

Answer 1

Anthony Sottile's suggestion to use --extra-index-url worked for me.