[BUG]安装报错，依赖的tiktoken编译报错

[weiyinfu]

Required prerequisites

• I have read the documentation https://camel-ai.github.io/camel/camel.html.
• I have searched the Issue Tracker and Discussions that this hasn't already been reported. (+1 or comment there if it has.)
• Consider asking first in a Discussion.

What version of camel are you using?

0.2.85

System information

安装就失败了，没到这一步呢。
pip install camel-ai
依赖tiktoken，tiktoken编译报错了。

Problem description

rom requests>=2.26.0->tiktoken<0.8,>=0.7.0->camel-ai) (3.4.4)
Requirement already satisfied: urllib3<3,>=1.21.1 in /Users/weiyinfu/miniconda3/lib/python3.13/site-packages (from requests>=2.26.0->tiktoken<0.8,>=0.7.0->camel-ai) (2.6.3)
Requirement already satisfied: click>=7.0 in /Users/weiyinfu/miniconda3/lib/python3.13/site-packages (from uvicorn>=0.31.1->mcp>=1.3.0->camel-ai) (8.1.8)
Building wheels for collected packages: tiktoken
Building wheel for tiktoken (pyproject.toml) ... error
error: subprocess-exited-with-error

× Building wheel for tiktoken (pyproject.toml) did not run successfully.
│ exit code: 1
╰─> [50 lines of output]
/private/var/folders/vf/blm5p7bs40515v7sw07_b_9h0000gn/T/pip-build-env-49o94qa8/overlay/lib/python3.13/site-packages/setuptools/config/_apply_pyprojecttoml.py:82: SetuptoolsDeprecationWarning: project.license as a TOML table is deprecated
!!

          ********************************************************************************
          Please use a simple string containing a SPDX expression for `project.license`. You can also use `project.license-files`. (Both options available on setuptools>=77.0.0).
  
          By 2027-Feb-18, you need to update your project and remove deprecated calls
          or your builds will no longer be supported.
  
          See https://packaging.python.org/en/latest/guides/writing-pyproject-toml/#license for details.
          ********************************************************************************
  
  !!
    corresp(dist, value, root_dir)
  running bdist_wheel
  running build
  running build_py
  creating build/lib.macosx-11.1-arm64-cpython-313/tiktoken
  copying tiktoken/registry.py -> build/lib.macosx-11.1-arm64-cpython-313/tiktoken
  copying tiktoken/__init__.py -> build/lib.macosx-11.1-arm64-cpython-313/tiktoken
  copying tiktoken/core.py -> build/lib.macosx-11.1-arm64-cpython-313/tiktoken
  copying tiktoken/model.py -> build/lib.macosx-11.1-arm64-cpython-313/tiktoken
  copying tiktoken/load.py -> build/lib.macosx-11.1-arm64-cpython-313/tiktoken
  copying tiktoken/_educational.py -> build/lib.macosx-11.1-arm64-cpython-313/tiktoken
  creating build/lib.macosx-11.1-arm64-cpython-313/tiktoken_ext
  copying tiktoken_ext/openai_public.py -> build/lib.macosx-11.1-arm64-cpython-313/tiktoken_ext
  running egg_info
  writing tiktoken.egg-info/PKG-INFO
  writing dependency_links to tiktoken.egg-info/dependency_links.txt
  writing requirements to tiktoken.egg-info/requires.txt
  writing top-level names to tiktoken.egg-info/top_level.txt
  reading manifest file 'tiktoken.egg-info/SOURCES.txt'
  reading manifest template 'MANIFEST.in'
  warning: no files found matching 'Makefile'
  adding license file 'LICENSE'
  writing manifest file 'tiktoken.egg-info/SOURCES.txt'
  copying tiktoken/py.typed -> build/lib.macosx-11.1-arm64-cpython-313/tiktoken
  running build_ext
  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.
  [end of output]

note: This error originates from a subprocess, and is likely not a problem with pip.
ERROR: Failed building wheel for tiktoken
Failed to build tiktoken
error: failed-wheel-build-for-install

× Failed to build installable wheels for some pyproject.toml based projects
╰─> tiktoken

Reproducible example code

The Python snippets:

Command lines:

Extra dependencies:

Steps to reproduce:

Traceback

Expected behavior

No response

Additional context

No response

[Zephyroam]

Hi @weiyinfu, thanks for reporting this issue!

The root cause is that tiktoken 0.7.x does not provide pre-built wheels for Python 3.13, so pip attempts to compile it from source, which requires a Rust compiler.

Workarounds:

1. Downgrade to Python 3.12 - tiktoken 0.7.0 has pre-built wheels for Python 3.12, so installation should work without compilation.
2. Install the Rust compiler

Then restart your terminal and retry pip install camel-ai.

[Zephyroam]

@Wendong-Fan Do we have any plan bumping tiktoken version?

[weiyinfu]

You're right and the answer is good.
tiktoken
This library is updated 4 month ago.
Why it's a strong dependency of camel-ai ?
After all, ask users install rust is difficult.
Most users use python>=3.13.
The experience is really bad when you blocked at the first step.

[Wendong-Fan]

thanks @weiyinfu for reporting this and @Zephyroam for supporting on this issue!