Worked on improving the reliability of the cachix/devenv repository by addressing a critical shutdown issue affecting child processes when using non-native process managers. Focused on backend development with Rust and asynchronous programming, the solution involved implementing direct awaiting of task execution during shutdown to ensure deterministic teardown. This approach guaranteed that all child processes were properly terminated, preventing orphaned processes and potential resource leakage. The fix enhanced the stability of the developer environment, reducing the risk of downtime during build and test workflows. The work demonstrated a methodical approach to cross-manager compatibility and robust process management within asynchronous Rust systems.