cannot install the KMC2

[jimi0209]

I run this command" pip install kmc2", then:
Collecting kmc2
Using cached kmc2-0.1.tar.gz (102 kB)
Preparing metadata (setup.py) ... done
Requirement already satisfied: numpy in c:\users\admin\anaconda3\envs\python38-pytorch18\lib\site-packages (from kmc2) (1.20.2)
Requirement already satisfied: scipy in c:\users\admin\anaconda3\envs\python38-pytorch18\lib\site-packages (from kmc2) (1.6.2)
Requirement already satisfied: scikit-learn in c:\users\admin\anaconda3\envs\python38-pytorch18\lib\site-packages (from kmc2) (1.1.1)
Requirement already satisfied: nose in c:\users\admin\anaconda3\envs\python38-pytorch18\lib\site-packages (from kmc2) (1.3.7)
Requirement already satisfied: joblib>=1.0.0 in c:\users\admin\anaconda3\envs\python38-pytorch18\lib\site-packages (from scikit-learn->kmc2) (1.1.0)
Requirement already satisfied: threadpoolctl>=2.0.0 in c:\users\admin\anaconda3\envs\python38-pytorch18\lib\site-packages (from scikit-learn->kmc2) (3.1.0)
Building wheels for collected packages: kmc2
Building wheel for kmc2 (setup.py) ... error
error: subprocess-exited-with-error

× python setup.py bdist_wheel did not run successfully.
│ exit code: 1
╰─> [12 lines of output]
running bdist_wheel
running build
running build_ext
building 'kmc2' extension
creating build
creating build\temp.win-amd64-3.8
creating build\temp.win-amd64-3.8\Release
C:\Program Files (x86)\Microsoft Visual Studio\2019\BuildTools\VC\Tools\MSVC\14.29.30037\bin\HostX86\x64\cl.exe /c /nologo /Ox /W3 /GL /DNDEBUG /MD -I. -Ic:\users\admin\anaconda3\envs\python38-pytorch18\lib\site-packages
numpy\core\include -Ic:\users\admin\anaconda3\envs\python38-pytorch18\include -Ic:\users\admin\anaconda3\envs\python38-pytorch18\include "-IC:\Program Files (x86)\Microsoft Visual Studio\2019\BuildTools\VC\Tools\MSVC\14.29.3003
7\include" /Tckmc2.c /Fobuild\temp.win-amd64-3.8\Release\kmc2.obj -O3
cl: 命令行 warning D9002 :忽略未知选项“-O3”
kmc2.c
c:\users\admin\anaconda3\envs\python38-pytorch18\include\pyconfig.h(59): fatal error C1083: 无法打开包括文件: “io.h”: No such file or directory
error: command 'C:\Program Files (x86)\Microsoft Visual Studio\2019\BuildTools\VC\Tools\MSVC\14.29.30037\bin\HostX86\x64\cl.exe' failed with exit status 2
[end of output]

note: This error originates from a subprocess, and is likely not a problem with pip.
ERROR: Failed building wheel for kmc2
Running setup.py clean for kmc2
Failed to build kmc2
Installing collected packages: kmc2
Running setup.py install for kmc2 ... error
error: subprocess-exited-with-error

× Running setup.py install for kmc2 did not run successfully.
│ exit code: 1
╰─> [12 lines of output]
running install
running build
running build_ext
building 'kmc2' extension
creating build
creating build\temp.win-amd64-3.8
creating build\temp.win-amd64-3.8\Release
C:\Program Files (x86)\Microsoft Visual Studio\2019\BuildTools\VC\Tools\MSVC\14.29.30037\bin\HostX86\x64\cl.exe /c /nologo /Ox /W3 /GL /DNDEBUG /MD -I. -Ic:\users\admin\anaconda3\envs\python38-pytorch18\lib\site-packages
numpy\core\include -Ic:\users\admin\anaconda3\envs\python38-pytorch18\include -Ic:\users\admin\anaconda3\envs\python38-pytorch18\include "-IC:\Program Files (x86)\Microsoft Visual Studio\2019\BuildTools\VC\Tools\MSVC\14.29.3003
7\include" /Tckmc2.c /Fobuild\temp.win-amd64-3.8\Release\kmc2.obj -O3
cl: 命令行 warning D9002 :忽略未知选项“-O3”
kmc2.c
c:\users\admin\anaconda3\envs\python38-pytorch18\include\pyconfig.h(59): fatal error C1083: 无法打开包括文件: “io.h”: No such file or directory
error: command 'C:\Program Files (x86)\Microsoft Visual Studio\2019\BuildTools\VC\Tools\MSVC\14.29.30037\bin\HostX86\x64\cl.exe' failed with exit status 2
[end of output]

note: This error originates from a subprocess, and is likely not a problem with pip.
error: legacy-install-failure

× Encountered error while trying to install package.
╰─> kmc2

note: This is an issue with the package mentioned above, not pip.
hint: See above for output from the failure.