Worked on stabilizing numpy 2.x compatibility within the hmemcpy/nixpkgs repository by updating the Piglit package to an unstable 2025-04-15 build. Addressed build failures by revising the version string, updating the source revision, and introducing necessary build dependencies to align with evolving development environments. Focused on build systems and package management using Nix, the work reduced CI and build failures for downstream projects and preserved package usability. Although no new features were added during this period, the targeted bug fix improved the reliability of the Piglit integration, ensuring continued compatibility with current Python and numpy versions in nixpkgs.