Unable to install a dev version of this project

Hi,

Accordind to Python standards, I try to install this project for dev, but it didn't work:

19:04 user@laptop ~/git/tl-p04 % vc && vact 
(tl-p04) 19:04 user@laptop ~/git/tl-p04 % pip install -e .[dev]

Usage:   
  pip install [options] <requirement specifier> [package-index-options] ...
  pip install [options] -r <requirements file> [package-index-options] ...
  pip install [options] [-e] <vcs project url> ...
  pip install [options] [-e] <local project path> ...
  pip install [options] <archive url/path> ...

-e option requires 1 argument
zsh: exit 2     pip install -e .[dev]
(tl-p04) 19:04 user@laptop ~/git/tl-p04 % pip --version 
pip 23.0.1 from /home/user/.venvs/tl-p04/lib/python3.11/site-packages/pip (python 3.11)
(tl-p04) 19:12 user@laptop ~/git/tl-p04 % uname -a
Linux laptop 6.1.0-37-amd64 #1 SMP PREEMPT_DYNAMIC Debian 6.1.140-1 (2025-05-22) x86_64 GNU/Linux