Worked on the linuxdeepin/dde-session-shell repository to improve reliability and packaging quality for the Deepin Desktop Environment session shell. Focused on build system configuration using CMake, addressing a critical issue where the Deepin Greeter install script lacked executable permissions after installation. Resolved this by switching the packaging method from FILES to PROGRAMS, ensuring the script is correctly marked as executable during the install process. This change eliminated a post-build failure that prevented the greeter from starting automatically, streamlining deployment and reducing manual intervention. The work emphasized careful attention to packaging details and traceability, with all changes recorded for auditability.