How do I tell vcpkg which cmake to use

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How do I specify which cmake 'vcpkg install' should use? Both for Classic and Manifest modes, under Windows and Linux.

We're setting up our project to use VCPkg in manifest mode. Both CMake and VCPkg are installed in the project/3rdparty/ sub-folder, however when CMake runs, triggering vcpkg install, the program looks for CMake and finds the system CMake in PATH(*), and immediately fails.

project/3rdparty/cmake/
project/3rdparty/vcpkg/

1. How do I tell vcpkg which CMake to use, in this case ./3rdparty/cmake/3.x.y/[windows/linux]/bin/cmake ?
2. Alternatively how do I tell vcpkg to "Use the cmake that triggered the call to vcpkg install"?

• It would be fine if vcpkg still checks cmake --version on the cmake executable I suggest, but I need it to skip searching PATH and version-checking anything it finds. How is this done?

(*) Due to a bug I've reported #22041, when vcpkg calls 'cmake --version', if the system-installed version replies with "Cmake3 version x.y.z" vcpkg errors out (it expected "cmake version x.y.z"). So allowing it to bypass this check on $PATH/cmake is important.