How can I set VCPKG_INSTALLED_RIR in CMake

[GasimGasimzada]

I have an existing project in C++ that I am trying to port to CMake. I am already using vcpkg for managing all packages and I install all packages to <repo>/vcpkg_installed as a separate step. I run it once both during local development and in CI/CD pipeline, then I build my project. Now, when I set up my project to work with CMake (cmake . -B build), I get a duplicate vcpkg_installed located inside the build directory. I want to change it so that my separate vcpkg installation step and cmake use the same vcpkg_installed directory. This is especially useful if I want to recreate the build directory but do not want to rebuild all my Vcpkg dependencies again (even though they are cached, they still take time).

[Neumann-A]

Pass to CMake: -DVCPKG_INSTALLED_DIR=<your pre-installed vcpkg path> ?

[GasimGasimzada]

I was trying to figure out how to set it in CMakeLists.txt file. I ended up doing this, which worked:

set(VCPKG_INSTALLED_DIR "${PROJECT_SOURCE_DIR}/vcpkg_installed")

Thank you for the help!