self: super: { hydra-unstable = super.hydra-unstable.overrideAttrs (oldAttrs: rec { patches = (oldAttrs.patches or []) ++ map super.fetchpatch [ { meta.description = "Fix unhelpful error messages in aggregate jobs."; url = "https://github.com/NixOS/hydra/pull/825.diff"; sha256 = "131lxgiyksfgx8m97ydsai7z2i9fpnqndmldhkyks0vizh0lw60f"; } ]; }); }