Failed to build `pymsalruntime==0.15.0a1

[davrous]

Can't manage to install the server using: https://insiders.vscode.dev/redirect/mcp/install?name=Azure%20Foundry%20MCP%20Server&config=%7B%22type%22%3A%22stdio%22%2C%22command%22%3A%22uvx%22%2C%22args%22%3A%5B%22--prerelease%3Dallow%22%2C%22--from%22%2C%22git%2Bhttps%3A%2F%2Fgithub.com%2Fazure-ai-foundry%2Fmcp-foundry.git%22%2C%22run-azure-ai-foundry-mcp%22%5D%7D from the blog post: https://devblogs.microsoft.com/foundry/azure-ai-foundry-mcp-server-may-2025/

With the following error:

2025-06-23 17:44:09.518 [warning] [server stderr] Building pymsalruntime==0.15.0a1
2025-06-23 17:44:14.043 [info] Waiting for server to respond to initialize request...
2025-06-23 17:44:14.355 [warning] [server stderr] × Failed to build pymsalruntime==0.15.0a1
2025-06-23 17:44:14.356 [warning] [server stderr] ├─▶ The build backend returned an error
2025-06-23 17:44:14.356 [warning] [server stderr] ╰─▶ Call to setuptools.build_meta.build_wheel failed

Having also similar issue while trying to build it locally:

Using Python 3.13.5 environment at: venv
Resolved 237 packages in 952ms
× Failed to build pymsalruntime==0.15.0a1
├─▶ The build backend returned an error
╰─▶ Call to setuptools.build_meta.build_wheel failed (exit code: 1)

  [stdout]
  running bdist_wheel
  running build
  running build_py
  copying pymsalruntime\__init__.py -> build\lib.win-amd64-cpython-313\pymsalruntime
  copying pymsalruntime\PyMsalRuntime.pyi -> build\lib.win-amd64-cpython-313\pymsalruntime
  copying pymsalruntime\msalruntime.dll -> build\lib.win-amd64-cpython-313\pymsalruntime
  running build_ext
  building 'pymsalruntime.pymsalruntime' extension

  [stderr]
  C:\Users\davrous\AppData\Local\uv\cache\builds-v0\.tmpbW2AQV\Lib\site-packages\setuptools\dist.py:332:
  InformationOnly: Normalizing '0.15.0-alpha1' to '0.15.0a1'
    self.metadata.version = self._normalize_version(self.metadata.version)
  C:\Users\davrous\AppData\Local\uv\cache\builds-v0\.tmpbW2AQV\Lib\site-packages\setuptools\dist.py:759:
  SetuptoolsDeprecationWarning: License classifiers are deprecated.
  !!

          ********************************************************************************
          Please consider removing the following classifiers in favor of a SPDX license expression:

          License :: OSI Approved :: MIT License

          See https://packaging.python.org/en/latest/guides/writing-pyproject-toml/#license for details.
          ********************************************************************************

  !!
    self._finalize_license_expression()
  error: Microsoft Visual C++ 14.0 or greater is required. Get it with "Microsoft C++ Build Tools":
  https://visualstudio.microsoft.com/visual-cpp-build-tools/

  hint: This usually indicates a problem with the package or the build environment.

help: pymsalruntime (v0.15.0a1) was included because azure-identity (v1.23.0) depends on msal[broker]
(v1.32.3) which depends on pymsalruntime

Note: I have the C++ Build Tools installed.

[luigiw]

Thx @davrous for reporting this issue. I assume you're on a Mac or an ARM PC? Did you try other Python versions? One workaround may be to run the uvx command from a specific conda environment where you have all dependencies installed. E.g.

"command": "/Users/.../miniconda3/envs/.../bin/uvx",

[davrous]

Hi! @luigiw, nope running a x64 AMD PC. I tried with Python 3.12 but had the same issue.

[dem108]

@davrous uv with pyproject.toml would deal with dependency issue in an isolated way: Did you have uv installed following the guideline https://docs.astral.sh/uv/getting-started/installation/? Or have you tried this in Dev Container? https://github.com/azure-ai-foundry/mcp-foundry/blob/main/.devcontainer/Dockerfile would have all dependencies resolved for uv. You may try to compare this environment and yours.