Cannot install requirements.txt

[chrismostert]

Describe the bug
When installing the requirements using pip I get the following error related to pyproj:

Collecting pyproj==3.1.0
  Downloading pyproj-3.1.0.tar.gz (182 kB)
     ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 182.6/182.6 kB ? eta 0:00:00
  Installing build dependencies ... done
  Getting requirements to build wheel ... error
  error: subprocess-exited-with-error

  × Getting requirements to build wheel did not run successfully.
  │ exit code: 1
  ╰─> [1 lines of output]
      proj executable not found. Please set the PROJ_DIR variable. For more information see: https://pyproj4.github.io/pyproj/stable/installation.html
      [end of output]

Additional info
Running Python 3.11.2 on Windows 11 (x64)
pip version 23.0.1
Clean venv