Installer fails in Windows 10

[jumpjack]

A first install fails due to missing definition of environment variables MUJOCO_PATH and MUJOCO_PLUGIN_PATH.
After setting them to MUJOCO_PATH =C:\Users_conc\Downloads\mujoco and MUJOCO_PLUGIN_PATH=C:\Users_conc\Downloads\mujoco\bin\mujoco_plugin, installation still fails due to "missing file" (" Impossibile trovare il file specificato"), but which file?

Final output:

 running install
  running build
  running build_py
  creating build
  creating build\lib.win32-3.10
  creating build\lib.win32-3.10\mujoco
  copying mujoco\bindings_test.py -> build\lib.win32-3.10\mujoco
  copying mujoco\gl_context.py -> build\lib.win32-3.10\mujoco
  copying mujoco\renderer.py -> build\lib.win32-3.10\mujoco
  copying mujoco\renderer_test.py -> build\lib.win32-3.10\mujoco
  copying mujoco\render_test.py -> build\lib.win32-3.10\mujoco
  copying mujoco\rollout.py -> build\lib.win32-3.10\mujoco
  copying mujoco\rollout_test.py -> build\lib.win32-3.10\mujoco
  copying mujoco\viewer.py -> build\lib.win32-3.10\mujoco
  copying mujoco\viewer_test.py -> build\lib.win32-3.10\mujoco
  copying mujoco\__init__.py -> build\lib.win32-3.10\mujoco
  creating build\lib.win32-3.10\mujoco\egl
  copying mujoco\egl\egl_ext.py -> build\lib.win32-3.10\mujoco\egl
  copying mujoco\egl\__init__.py -> build\lib.win32-3.10\mujoco\egl
  creating build\lib.win32-3.10\mujoco\glfw
  copying mujoco\glfw\__init__.py -> build\lib.win32-3.10\mujoco\glfw
  creating build\lib.win32-3.10\mujoco\osmesa
  copying mujoco\osmesa\__init__.py -> build\lib.win32-3.10\mujoco\osmesa
  running build_ext
  error: [WinError 2] Impossibile trovare il file specificato
  Configuring CMake with the following arguments:
      -DPython3_ROOT_DIR:PATH=C:/Users/_conc/AppData/Local/Programs/Python/Python310-32
      -DPython3_EXECUTABLE:STRING=C:/Users/_conc/AppData/Local/Programs/Python/Python310-32/python.exe
      -DCMAKE_MODULE_PATH:PATH=C:/Users/_conc/AppData/Local/Temp/pip-install-r1cxrofn/mujoco_8a926e14192e48e69dac3593e46ed701/cmake
      -DCMAKE_BUILD_TYPE:STRING=Release
      -DCMAKE_LIBRARY_OUTPUT_DIRECTORY:PATH=build/temp.win32-3.10/Release
      -DCMAKE_INTERPROCEDURAL_OPTIMIZATION:BOOL=ON
      -DCMAKE_Fortran_COMPILER:STRING=
      -DBUILD_TESTING:BOOL=OFF
      -DMUJOCO_LIBRARY_DIR:PATH=C:/Users/_conc/Downloads/mujoco/lib
      -DMUJOCO_INCLUDE_DIR:PATH=C:/Users/_conc/Downloads/mujoco/include