Bug: there is an unexpected bug when building an environment by option2.

[lihm23]

I deployed the project on the company's server without external network proxy. I downloaded all dependencies locally, packed them as .tar.gz, uploaded and unpacked it on the server, than ran pip install. An unknown error popped up when installing sglang.
The installation failed halfway while parsing  pyproject.toml . The error log shows:  error: can't find rust compiler . Does this dependency require a Rust compiler to build?

[lihm23]

Building editable for sglang (pyproject.toml) ... error
error: subprocess-exited-with-error
× Building editable for sglang (pyproject.toml) did not run successfully.
│ exit code: 1
ERROR: Failed building editable for sglang
note: This error originates from a subprocess, and is likely not a problem with pip.

running build_rust
error: can't find Rust compiler
If you are using an outdated pip version, it is possible a prebuilt wheel is available for this package but pip is not able to install from it. Installing from the wheel would avoid the need for a Rust compiler.
To update pip, run:
pip install --upgrade pip
and then retry package installation.
If you did intend to build this package from source, try installing a Rust compiler from your system package manager and ensure it is on the PATH during installation. Alternatively, rustup (available at https://rustup.rs) is the recommended way to download and update the Rust compiler toolchain.