Error installing Pyyaml==5.4 and unable to build wheels for cffi, cryptography, psycopg2-binary

[ashrafkvt]

Being unable to install some of the project dependencies listed in the requirements file

• [x] I have verified that that issue exists against the master branch.
• [x] I have searched for similar issues in both open and closed tickets and cannot find a duplicate.

[kbidve]

I faced the same issue, here are the steps I followed :

1. Updated pip and setuptools:

   pip install --upgrade pip setuptools

2. Install wheel

   pip install wheel

3. Before installing cryptography, I installed dependent packages on my Mac: brew install openssl libffi
4. I removed pyyaml, cryptography from "requirements.txt" and installed manually , without providing versions which installed latest versions

   pip install cryptography pip install pyyaml

I hope this will resolve your issue.