Adam Perkowski developed a new build hook, julec.hook, for the NixOS/nixpkgs repository, focusing on structured build, check, and install phases for the Jule programming language. Leveraging skills in build systems, Nix, and shell scripting with bash and nix, Adam implemented configurable source and output directories as well as flexible test configurations. This approach reduced boilerplate and improved reproducibility for Jule-based software integration and testing within nixpkgs. The work, co-authored with philiptaron, demonstrated a thoughtful design that addressed the need for automation and adaptability in build processes, though it was limited in scope to a single feature over one month.