Worked on the raexera/nixpkgs repository to address a critical system initialization issue by ensuring that the systemd-machine-id-commit.service reliably persists the /etc/machine-id file to disk during the first boot. This change prevents subsequent boots from being misidentified as initial boots, improving system reliability and identification. The solution involved updating NixOS system configuration and modifying systemd settings, with additional tests implemented to verify correct first-boot behavior. Leveraged expertise in Nix, NixOS, and systemd to deliver a focused bug fix, maintaining code quality through targeted changes and thorough validation, while contributing to the stability of system configuration management workflows.