Worked on the tweag/nix-security-tracker repository to improve the stability and reliability of Nix-based fetch and evaluation pipelines. Addressed a key issue by implementing git version pinning, ensuring that both fetch_all_channels and the Nix evaluation process consistently use the git package from nixpkgs rather than relying on the host system’s git version. This approach reduced failures caused by environment drift and enhanced reproducibility across CI and deployment environments. The work focused on internal infrastructure, with no user-facing changes, and leveraged skills in DevOps, Nix, and version control to deliver a targeted bug fix that supports long-term pipeline maintenance.