pip install -r requirements.txt

  Collecting y-py<0.7.0,>=0.6.0 (from jupyter-ydoc~=0.2.4->jupyterlab~=3.0)
    Using cached y_py-0.6.2.tar.gz (53 kB)
    Installing build dependencies: started
    Installing build dependencies: finished with status 'done'
    Getting requirements to build wheel: started
    Getting requirements to build wheel: finished with status 'done'
    Preparing metadata (pyproject.toml): started
    Preparing metadata (pyproject.toml): finished with status 'error'
    error: subprocess-exited-with-error

    Preparing metadata (pyproject.toml) did not run successfully.
    exit code: 1

    [6 lines of output]

    Cargo, the Rust package manager, is not installed or is not on PATH.
    This package requires Rust and Cargo to compile extensions. Install it through
    the system's package manager or via https://rustup.rs/

    Checking for Rust toolchain....
    [end of output]

    note: This error originates from a subprocess, and is likely not a problem with pip.
  error: metadata-generation-failed

  Encountered error while generating package metadata.

  See above for output.

  note: This is an issue with the package mentioned above, not pip.
  hint: See above for details.
  [end of output]

note: This error originates from a subprocess, and is likely not a problem with pip.
error: subprocess-exited-with-error

× pip subprocess to install build dependencies did not run successfully.
 │ exit code: 1
╰─> See above for output.

note: This error originates from a subprocess, and is likely not a problem with pip.