Alexandre Fresnais developed a new unprivileged installation option for the Install command in the uutils/coreutils repository, enabling users to perform installations without elevated privileges while maintaining correct ownership semantics and security. Working primarily in Rust, Alexandre designed and implemented the -U option, ensuring backward compatibility and robust privilege handling. The work included comprehensive tests covering both typical and edge cases, as well as updates to documentation and localization to guide unprivileged users. By focusing on system programming and command line utilities, Alexandre broadened deployment scenarios and improved usability, demonstrating careful attention to detail and thorough validation throughout the development process.