[CMake] Need help with CMake error "CMake Error at tools/clang/lib/Headers/cmake_install.cmake:36 file INSTALL cannot find "C:/llvm-project/build/$(Configuration)/lib/clang/9.0.0/include"."

[Osman Zakir]

As the title says, I have this error when trying to build INSTALL.vcxproj in LLVM.sln using Visual Studio Community 2019:
"
522>CMake Error at tools/clang/lib/Headers/cmake_install.cmake:36 (file):
522>  file INSTALL cannot find​
522>  "C:/llvm-project/build/$(Configuration)/lib/clang/9.0.0/include".​
522>Call Stack (most recent call first):​
522>  tools/clang/lib/cmake_install.cmake:37 (include)​
522>  tools/clang/cmake_install.cmake:54 (include)​
522>  tools/cmake_install.cmake:43 (include)​
522>  cmake_install.cmake:64 (include)​
522>​
522>​
522>C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\MSBuild\Microsoft\VC\v160\Microsoft.CppCommon.targets(138,5): error MSB3073: The command "setlocal​
522>C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\MSBuild\Microsoft\VC\v160\Microsoft.CppCommon.targets(138,5): error MSB3073: "C:\Program Files\CMake\bin\cmake.exe" -DBUILD_TYPE=Release -P cmake_install.cmake​
522>C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\MSBuild\Microsoft\VC\v160\Microsoft.CppCommon.targets(138,5): error MSB3073: if %errorlevel% neq 0 goto :cmEnd​
522>C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\MSBuild\Microsoft\VC\v160\Microsoft.CppCommon.targets(138,5): error MSB3073: :cmEnd​
522>C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\MSBuild\Microsoft\VC\v160\Microsoft.CppCommon.targets(138,5): error MSB3073: endlocal & call :cmErrorLevel %errorlevel% & goto :cmDone​
522>C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\MSBuild\Microsoft\VC\v160\Microsoft.CppCommon.targets(138,5): error MSB3073: :cmErrorLevel​
522>C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\MSBuild\Microsoft\VC\v160\Microsoft.CppCommon.targets(138,5): error MSB3073: exit /b %1​
522>C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\MSBuild\Microsoft\VC\v160\Microsoft.CppCommon.targets(138,5): error MSB3073: :cmDone​
522>C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\MSBuild\Microsoft\VC\v160\Microsoft.CppCommon.targets(138,5): error MSB3073: if %errorlevel% neq 0 goto :VCEnd​
522>C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\MSBuild\Microsoft\VC\v160\Microsoft.CppCommon.targets(138,5): error MSB3073: :VCEnd" exited with code 1.​
522>Done building project "INSTALL.vcxproj" -- FAILED.
"

Everything else was built successfully, it's just this one project that it can't build.  I checked in the file path it mentioned and I can see the "include" folder in there.  So there's probably something I need to change in cmake_install.cmake.  I've attached the file to this message.  I hope someone will help me change it such that this will work.  Thanks in advance.
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