Use System::set_environmental_variable()
MODIFY
src/commands_build.cpp
src/commands_build.cpp
@@ -38,8 +38,8 @@ namespace vcpkg::Commands::Build
}
// If these environment variables are set while running the VS2017 developer prompt, it will not correctly initialize the build environment.
- _wputenv_s(L"VSINSTALLDIR", L"");
- _wputenv_s(L"DevEnvDir", L"");
+ System::set_environmental_variable(L"VSINSTALLDIR", L"");
+ System::set_environmental_variable(L"DevEnvDir", L"");
const fs::path ports_cmake_script_path = paths.ports_cmake;
const Environment::vcvarsall_and_platform_toolset vcvarsall_bat = Environment::get_vcvarsall_bat(paths);

Use System::set_environmental_variable()