Boris Petkov upgraded the build system for the microsoft/vcpkg repository by updating its NuGet dependency from version 5.11.0 to 6.11.1. He revised the build scripts to incorporate the new download URL, filename, SHA512 checksum, and tool subdirectory, ensuring the project aligned with current tooling and security standards. This work focused on build systems and dependency management, using CMake and NuGet tooling to automate and validate the upgrade process. By modernizing the build infrastructure, Boris improved reliability and compatibility for downstream consumers, demonstrating a methodical approach to version pinning and continuous integration compatibility within a large-scale open source project.