Hi folks, I am trying to run the Metaflow service locally by following the readme. Right now, I am not even able to install the dependencies in a clean conda env. It fails at

pip3 install ./

stage itself with:

Preparing metadata (setup.py) ... error
  error: subprocess-exited-with-error
  
  × python setup.py egg_info did not run successfully.
  │ exit code: 1
  ╰─> [23 lines of output]
      running egg_info
      creating /private/var/folders/90/jbwyzwd517v52l287t_7vv0m0000gn/T/pip-pip-egg-info-f72m385w/psycopg2.egg-info
      writing /private/var/folders/90/jbwyzwd517v52l287t_7vv0m0000gn/T/pip-pip-egg-info-f72m385w/psycopg2.egg-info/PKG-INFO
      writing dependency_links to /private/var/folders/90/jbwyzwd517v52l287t_7vv0m0000gn/T/pip-pip-egg-info-f72m385w/psycopg2.egg-info/dependency_links.txt
      writing top-level names to /private/var/folders/90/jbwyzwd517v52l287t_7vv0m0000gn/T/pip-pip-egg-info-f72m385w/psycopg2.egg-info/top_level.txt
      writing manifest file '/private/var/folders/90/jbwyzwd517v52l287t_7vv0m0000gn/T/pip-pip-egg-info-f72m385w/psycopg2.egg-info/SOURCES.txt'
      
      Error: pg_config executable not found.
      
      pg_config is required to build psycopg2 from source.  Please add the directory
      containing pg_config to the $PATH or specify the full executable path with the
      option:
      
          python setup.py build_ext --pg-config /path/to/pg_config build ...
      
      or with the pg_config option in 'setup.cfg'.
      
      If you prefer to avoid building psycopg2 from source, please install the PyPI
      'psycopg2-binary' package instead.
      
      For further information please check the 'doc/src/install.rst' file (also at
      <<https://www.psycopg.org/docs/install.html>>).
      
      [end of output]
  
  note: This error originates from a subprocess, and is likely not a problem with pip.
error: metadata-generation-failed

× Encountered error while generating package metadata.
╰─> See above for output.

note: This is an issue with the package mentioned above, not pip.
hint: See above for details.

Does this need any extra setup before the installation? Thanks!

Try installing psycopg2-binary first then pip install ./ after that. If that does not work, you may need to install postgres.