Worked on the sonic-buildimage repository to enhance build reliability by focusing on deterministic builds and reproducibility. Addressed a build failure related to the time crate update by enforcing strict dependency locking, updating the Makefile to use Cargo’s --locked flag during the install step. This approach ensured that only dependencies specified in Cargo.lock were used, preventing drift and reducing build failures across branches. Validated the solution by successfully building images for both the 202511 and master branches. The work leveraged Rust and build automation skills, emphasizing reproducible workflows and robust dependency management within the Rust-based build system.