VCPKG Uses the wrong Visual Studio Toolset when using Ninja as the generator

[ccpjosephf]

Describe the bug
I am setting: set(VCPKG_PLATFORM_TOOLSET v141) inside a custom triplet that I am passing to vcpkg via:

"cacheVariables": {
    "VCPKG_OVERLAY_TRIPLETS": "${sourceDir}/cmake/vcpkg/triplets",
    "VCPKG_TARGET_TRIPLET": "my-custom-triplet",
    "VCPKG_HOST_TRIPLET": "my-custom-triplet"
},

Environment

• OS: Windows
• Compiler: Visual Studio v141, but also have v143 installed (or just any newer version)

To Reproduce
Steps to reproduce the behavior:

1. specify a toolset in a custom triplet. Use Ninja Multi-Config as the generator
2. call cmake build with --verbose, see that the latest toolset version is used, regardless of what value VCPKG_PLATFORM_TOOLSET was set to in the triplet file

Expected behavior
The project gets compiled by the version of compiler specified in by VCPKG_PLATFORM_TOOLSET in the triplet file

Failure logs
set(VCPKG_PLATFORM_TOOLSET v141)

Run Build Command(s): C:/. . . . ./CMake/Ninja/ninja.exe -v -f build-Debug.ninja MyProject
[1/19] C:\. . . . .\VC\Tools\MSVC\1438~1.331\bin\Hostx64\x64\cl.exe

When running my configure step I get the log lines:

-- Running vcpkg install
Detecting compiler hash for triplet my-custom-triplet...
Compiler found: C:/Program Files/Microsoft Visual Studio/2022/Professional/VC/Tools/MSVC/14.16.27023/bin/HostX64/x64/cl.exe

[Neumann-A]

vcpkg has no control about your top level dev environment or project.

[ccpjosephf]

Thanks for the response, I've probably misunderstood something about Ninja. I'll close this