Zero Hydra Failures towards 26.05 NixOS release

NixOS-26.05 is around the corner! The schedule says it should happen around 25 May. Today the release process entered ZHF phase. There most packages with build failures are expected to be addresses by the release date. https://github.com/NixOS/nixpkgs/issues/516381 contains detailed step-by-step to identify interesting packages. This time nixpkgs is full of build failures related to gcc-15 changes ( -std=gnu23 switch). An example package fix I usually try to fix at least one package during ZHF . Let’s do it again. I picked ior package. hydra says it is broken since January 2026. Most recent ht

• #zero
• #nixos
• #towards