During their work on the srid/nixpkgs repository, Paparodeo focused on stabilizing the LLVM19 toolchain for macOS, addressing codesign and CFI directive issues to improve build reliability. They enhanced Darwin and macOS OCaml tooling by resolving sandbox and networking problems, modernized packaging metadata, and standardized library access using Nix and C. In Saghen/nixpkgs, Paparodeo fixed Darwin bootstrap failures by switching to a non-interactive bash shell, restoring stable automated builds. Their contributions demonstrated depth in build system management, cross-platform development, and system packaging, resulting in more reproducible builds and improved CI stability for macOS environments in nixpkgs.