Worked on stabilizing the continuous integration pipeline for the cryspen/libcrux repository by addressing a regression related to the nix-installer-action version pinning. Focused on restoring the expected behavior of nix-based environments, the developer reverted a previous change in the CI workflow, ensuring that the pipeline remained reliable and predictable for ongoing development and releases. This adjustment was implemented using YAML within a DevOps and CI/CD context, resulting in a single, auditable commit that facilitates future reviews or rollbacks. The work prioritized maintaining the integrity of the release process and supporting consistent development cycles without introducing new features.