Worked on the rust-lang/rust repository to deliver a targeted enhancement to the build system, focusing on improving the bootstrap process for Rust projects. Developed and integrated a flexible configuration option that allows users to specify the rustdoc binary path directly within the bootstrap configuration. This addition, implemented using Rust and system programming techniques, increased build configurability and reproducibility, particularly benefiting continuous integration workflows and contributor onboarding. By concentrating on a single, low-risk feature with minimal surface area, the work ensured stability while enabling greater customization for rustdoc-related builds, demonstrating a thoughtful approach to build configuration and project maintainability.