Worked on the prefix-dev/pixi repository to enhance PEP 508 dependency serialization, focusing on improving correctness and reproducibility across environments. Developed support for converting file URLs to filesystem paths and added handling for relative paths, ensuring that user input is preserved during serialization to maintain intent and reliability. Addressed a bug related to incorrect path representation by aligning serialization with standard PEP 508 expectations, which improved cross-OS compatibility and maintainability. Comprehensive tests were implemented to validate the new functionality. The work was carried out using Rust, with an emphasis on dependency management and robust testing practices throughout the development process.