Originally reported here - pypa/pip#13055

Environment Versions

1. OS Type: MacOS 15.0.1, Ubuntu 24.04
2. Python version: $ python -V Python 3.9.6
3. pip version: $ pip --version pip 24.3.1
4. pip-tools version: $ pip-compile --version 7.4.1

Steps to replicate

Sample repo in referred issue.

With pip 24.2

backoff==2.2.1
    # via -r requirements.in

With pip 24.3.1

backoff==2.2.1
    # via -r /Users/rosen/Personal/sample/requirements.in

Expected result

The relative references should be preserved

Actual result

Relative paths get replaced with absolute paths