Can't build with python 3.14 (Windows) - No Microsoft Visual C++ version found

[luizrlima2]

I am unable to build the project on Windows 11 when using Python 3.14

Followed the instructions

git clone https://github.com/Relrin/kurier.git
cd kurier
python -m venv venv
venv\Scripts\activate
pip install -r requirements.txt --> ERROR

Environment Details
Operating System: Windows 11
Python Version: 3.14
Pip Version: 26.1

(venv) C:\Users\luizr\kurier>pip install -r requirements.txt
Collecting wxPython==4.2.3 (from -r requirements.txt (line 1))
Using cached wxPython-4.2.3.tar.gz (58.9 MB)
Installing build dependencies ... done
Getting requirements to build wheel ... done
Preparing metadata (pyproject.toml) ... done
Collecting Pypubsub==4.0.3 (from -r requirements.txt (line 2))
Using cached Pypubsub-4.0.3-py3-none-any.whl.metadata (2.2 kB)
Collecting pika==1.3.1 (from -r requirements.txt (line 3))
Using cached pika-1.3.1-py3-none-any.whl.metadata (13 kB)
Using cached Pypubsub-4.0.3-py3-none-any.whl (61 kB)
Using cached pika-1.3.1-py3-none-any.whl (155 kB)
Building wheels for collected packages: wxPython
Building wheel for wxPython (pyproject.toml) ... error
error: subprocess-exited-with-error

× Building wheel for wxPython (pyproject.toml) did not run successfully.
│ exit code: 1
╰─> [75 lines of output]
C:\Users\luizr\AppData\Local\Temp\pip-build-env-njx17rpw\overlay\Lib\site-packages\setuptools\config_apply_pyprojecttoml.py:61: SetuptoolsDeprecationWarning: License classifiers are deprecated.
!!

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

          License :: OSI Approved

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

  !!
    dist._finalize_license_expression()
  C:\Users\luizr\AppData\Local\Temp\pip-build-env-njx17rpw\overlay\Lib\site-packages\setuptools\dist.py:765: SetuptoolsDeprecationWarning: License classifiers are deprecated.
  !!

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

          License :: OSI Approved

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

  !!
    self._finalize_license_expression()
  running bdist_wheel
  running build
  Will build using: "C:\Users\luizr\kurier\venv\Scripts\python.exe"
  3.14.4 (tags/v3.14.4:23116f9, Apr  7 2026, 14:10:54) [MSC v.1944 64 bit (AMD64)]
  Python's architecture is 64bit
  cfg.VERSION: 4.2.3

  Running command: build
  Running command: build_wx
  Command '"C:\Users\luizr\kurier\venv\Scripts\python.exe" -c "import os, sys, setuptools.msvc; setuptools.msvc.isfile = lambda path: path is not None and os.path.isfile(path); ei = setuptools.msvc.EnvironmentInfo('x64', vc_min_ver=14.0); env = ei.return_env(); env['vc_ver'] = ei.vc_ver; env['vs_ver'] = ei.vs_ver; env['arch'] = ei.pi.arch; env['py_ver'] = sys.version_info[:2]; print(env)"' failed with exit code 1.
  Traceback (most recent call last):

    File "<string>", line 1, in <module>

      import os, sys, setuptools.msvc; setuptools.msvc.isfile = lambda path: path is not None and os.path.isfile(path); ei = setuptools.msvc.EnvironmentInfo('x64', vc_min_ver=14.0); env = ei.return_env(); env['vc_ver'] = ei.vc_ver; env['vs_ver'] = ei.vs_ver; env['arch'] = ei.pi.arch; env['py_ver'] = sys.version_info[:2]; print(env)

                                                                                                                             ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^

    File "C:\Users\luizr\AppData\Local\Temp\pip-build-env-njx17rpw\overlay\Lib\site-packages\setuptools\msvc.py", line 931, in __init__

      self.si = SystemInfo(self.ri, vc_ver)

                ~~~~~~~~~~^^^^^^^^^^^^^^^^^

    File "C:\Users\luizr\AppData\Local\Temp\pip-build-env-njx17rpw\overlay\Lib\site-packages\setuptools\msvc.py", line 385, in __init__

      self.vs_ver = self.vc_ver = vc_ver or self._find_latest_available_vs_ver()

                                            ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^

    File "C:\Users\luizr\AppData\Local\Temp\pip-build-env-njx17rpw\overlay\Lib\site-packages\setuptools\msvc.py", line 399, in _find_latest_available_vs_ver

      raise distutils.errors.DistutilsPlatformError(

          'No Microsoft Visual C++ version found'

      )

  distutils.errors.DistutilsPlatformError: No Microsoft Visual C++ version found
  Finished command: build_wx (0.573s)
  Finished command: build (0.573s)
  WARNING: Building this way assumes that all generated files have been
  generated already.  If that is not the case then use build.py directly
  to generate the source and perform the build stage.  You can use
  --skip-build with the bdist_* or install commands to avoid this
  message and the wxWidgets and Phoenix build steps in the future.

  "C:\Users\luizr\kurier\venv\Scripts\python.exe" -u build.py build
  Command '"C:\Users\luizr\kurier\venv\Scripts\python.exe" -u build.py build' failed with exit code 1.
  [end of output]

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

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

[luizrlima2]

I've manually installed all the requirements in the "requirements" and "requirements-build" files and builded the executable using the informed command line

(venv) C:\Users\luizr\kurier>pyinstaller --clean --workpath=build/temp --distpath=build/dist --onefile --nowindowed --noconsole --name=Kurier ./kurier/main.py
82 DEPRECATION: Running PyInstaller as admin is not necessary nor sensible. Run PyInstaller from a non-administrator terminal. PyInstaller 7.0 will block this.
290 INFO: PyInstaller: 6.16.0, contrib hooks: 2026.4
291 INFO: Python: 3.14.4
339 INFO: Platform: Windows-11-10.0.26200-SP0
339 INFO: Python environment: C:\Users\luizr\kurier\venv
341 INFO: wrote C:\Users\luizr\kurier\Kurier.spec
343 INFO: Removing temporary files and cleaning cache in C:\Users\luizr\AppData\Local\pyinstaller
356 INFO: Module search paths (PYTHONPATH):
['C:\Users\luizr\kurier\venv\Scripts\pyinstaller.exe',
'C:\Users\luizr\AppData\Local\Python\pythoncore-3.14-64\python314.zip',
'C:\Users\luizr\AppData\Local\Python\pythoncore-3.14-64\DLLs',
'C:\Users\luizr\AppData\Local\Python\pythoncore-3.14-64\Lib',
'C:\Users\luizr\AppData\Local\Python\pythoncore-3.14-64',
'C:\Users\luizr\kurier\venv',
'C:\Users\luizr\kurier\venv\Lib\site-packages',
'C:\Users\luizr\kurier']
868 INFO: checking Analysis
869 INFO: Building Analysis because Analysis-00.toc is non existent
869 INFO: Looking for Python shared library...
869 INFO: Using Python shared library: C:\Users\luizr\AppData\Local\Python\pythoncore-3.14-64\python314.dll
869 INFO: Running Analysis Analysis-00.toc
870 INFO: Target bytecode optimization level: 0
870 INFO: Initializing module dependency graph...
872 INFO: Initializing module graph hook caches...
889 INFO: Analyzing modules for base_library.zip ...
3406 INFO: Processing standard module hook 'hook-encodings.py' from 'C:\Users\luizr\kurier\venv\Lib\site-packages\PyInstaller\hooks'
4428 INFO: Processing standard module hook 'hook-pickle.py' from 'C:\Users\luizr\kurier\venv\Lib\site-packages\PyInstaller\hooks'
4894 INFO: Processing standard module hook 'hook-difflib.py' from 'C:\Users\luizr\kurier\venv\Lib\site-packages\PyInstaller\hooks'
4912 INFO: Processing standard module hook 'hook-heapq.py' from 'C:\Users\luizr\kurier\venv\Lib\site-packages\PyInstaller\hooks'
8232 INFO: Caching module dependency graph...
8267 INFO: Analyzing C:\Users\luizr\kurier\kurier\main.py
8393 INFO: Processing standard module hook 'hook-platform.py' from 'C:\Users\luizr\kurier\venv\Lib\site-packages\PyInstaller\hooks'
8456 INFO: Processing standard module hook 'hook-sysconfig.py' from 'C:\Users\luizr\kurier\venv\Lib\site-packages\PyInstaller\hooks'
8464 INFO: Processing standard module hook 'hook-_ctypes.py' from 'C:\Users\luizr\kurier\venv\Lib\site-packages\PyInstaller\hooks'
8615 INFO: Processing module hooks (post-graph stage)...
8633 INFO: Performing binary vs. data reclassification (1 entries)
8636 INFO: Looking for ctypes DLLs
8654 INFO: Analyzing run-time hooks ...
8658 INFO: Including run-time hook 'pyi_rth_inspect.py' from 'C:\Users\luizr\kurier\venv\Lib\site-packages\PyInstaller\hooks\rthooks'
8665 INFO: Creating base_library.zip...
8693 INFO: Looking for dynamic libraries
8935 INFO: Extra DLL search directories (AddDllDirectory): []
8935 INFO: Extra DLL search directories (PATH): []
9127 INFO: Warnings written to C:\Users\luizr\kurier\build\temp\Kurier\warn-Kurier.txt
9147 INFO: Graph cross-reference written to C:\Users\luizr\kurier\build\temp\Kurier\xref-Kurier.html
9185 INFO: checking PYZ
9186 INFO: Building PYZ because PYZ-00.toc is non existent
9187 INFO: Building PYZ (ZlibArchive) C:\Users\luizr\kurier\build\temp\Kurier\PYZ-00.pyz
9328 INFO: Building PYZ (ZlibArchive) C:\Users\luizr\kurier\build\temp\Kurier\PYZ-00.pyz completed successfully.
9342 INFO: checking PKG
9342 INFO: Building PKG because PKG-00.toc is non existent
9342 INFO: Building PKG (CArchive) Kurier.pkg
10246 INFO: Building PKG (CArchive) Kurier.pkg completed successfully.
10251 INFO: Bootloader C:\Users\luizr\kurier\venv\Lib\site-packages\PyInstaller\bootloader\Windows-64bit-intel\runw.exe
10251 INFO: checking EXE
10252 INFO: Building EXE because EXE-00.toc is non existent
10253 INFO: Building EXE from EXE-00.toc
10255 INFO: Copying bootloader EXE to C:\Users\luizr\kurier\build\dist\Kurier.exe
10335 INFO: Copying icon to EXE
10397 INFO: Copying 0 resources to EXE
10397 INFO: Embedding manifest in EXE
10461 INFO: Appending PKG archive to EXE
10551 INFO: Fixing EXE headers
11441 INFO: Building EXE from EXE-00.toc completed successfully.
11444 INFO: Build complete! The results are available in: C:\Users\luizr\kurier\build\dist

(venv) C:\Users\luizr\kurier>

I get the following error when running the Kurier.exe executable:

Failed to execute script ' main' due to unhandled exception: No module named ' wx'
Traceback (most recent call last):
File "main.py", line 6, in
ModuleNotFoundError: No module named 'wx'

[Relrin]

Thank you for reporting an issue!

I do presume that the issue might be related that you might need to install the latest wxPython version to resolve the issue related to the packaging & No module named 'wx' error reports.

Did you install any other wxPython previously on your machine? Have tried manually to install the latest wxPython?

[Relrin]

I also commited the latest requirements files. Could you try again to install them & build the app from scratch?