[Python] ERROR: Could not install packages due to an OSError: [Errno 28] No space left on...

I am facing an error to install the packages on aws ec2 instance with Ubuntu 18 using the following command -

pip install -e .

The error is -

ERROR: Could not install packages due to an OSError: [Errno 28] No space left on device

What did I check?

1. RAM using free -h command.
2. Disk utilization using sudo ncdu -x command.
3. Since pip tries to download to the default location given by TMPDIR variable, I also removed files from that location.
4. I removed contents from .cache directory.
5. I removed contents from /tmp directory.

Still I am facing this issue.

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