pip install -e . -r requirement faild, why?

[sznariOsmosis]

|████████████████████████████████| 426 kB 487 kB/s
ERROR: Command errored out with exit status 1:
 command: /datalake/ether_sql/envname/bin/python -c 'import io, os, sys, setuptools, tokenize; sys.argv[0] = '"'"'/tmp/pip-install-33wxg7dh/psycopg2-binary_cf9a7f4c7c1d4ec593fc8124f2e57da6/setup.py'"'"'; __file__='"'"'/tmp/pip-install-33wxg7dh/psycopg2-binary_cf9a7f4c7c1d4ec593fc8124f2e57da6/setup.py'"'"';f = getattr(tokenize, '"'"'open'"'"', open)(__file__) if os.path.exists(__file__) else io.StringIO('"'"'from setuptools import setup; setup()'"'"');code = f.read().replace('"'"'\r\n'"'"', '"'"'\n'"'"');f.close();exec(compile(code, __file__, '"'"'exec'"'"'))' egg_info --egg-base /tmp/pip-pip-egg-info-2lg0d5n2
     cwd: /tmp/pip-install-33wxg7dh/psycopg2-binary_cf9a7f4c7c1d4ec593fc8124f2e57da6/
Complete output (23 lines):
running egg_info
creating /tmp/pip-pip-egg-info-2lg0d5n2/psycopg2_binary.egg-info
writing /tmp/pip-pip-egg-info-2lg0d5n2/psycopg2_binary.egg-info/PKG-INFO
writing dependency_links to /tmp/pip-pip-egg-info-2lg0d5n2/psycopg2_binary.egg-info/dependency_links.txt
writing top-level names to /tmp/pip-pip-egg-info-2lg0d5n2/psycopg2_binary.egg-info/top_level.txt
writing manifest file '/tmp/pip-pip-egg-info-2lg0d5n2/psycopg2_binary.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
<http://initd.org/psycopg/docs/install.html>).

----------------------------------------

[wuzhy1ng]

I try to delete the version restriction of psycopg2-binary in requirements.txt and run pip install again:

# modified ethjsonrpc
web3==4.4.1

# SqlAlchemy
sqlalchemy==1.3.17
alembic==0.9.9
psycopg2-binary

# CLI
Click==6.7

# Testing and coverage
pytest==3.0.0
pytest-cov==2.2.1

# For building docs
sphinx==1.7.4
sphinx_rtd_theme==0.3.1
sphinx_click==1.2.0

# Task queue
Celery==4.1.1
flower==0.9.2

It works!

[sxguan]

and how did you compile the project