Worked on the koreader/koreader repository to improve the stability and portability of the development workflow by addressing a critical issue with SDL3 library management in Nix-based environments. Focused on Nix configuration, the developer implemented a targeted bug fix that corrected the SDL3 library path within the Nix shell, ensuring proper linking and reducing both build and runtime errors. This adjustment enhanced the reliability of local development setups and facilitated smoother cross-environment usage. The work demonstrated a strong understanding of library management and Nix, with all changes implemented in the Nix language to support consistent and reproducible development experiences.