Running nixpkgs-update (https://github.com/NixOS/infra/blob/main/non-critical-infra/modules/nixpkgs-update/README.md) with UPDATE_INFO: emu2 2021.01-unstable-2021-09-22 -> 2021.01 https://github.com/dmsc/emu2/releases
attrpath: emu2
Checking auto update branch...
No auto update branch exists
2021.01 is not newer than 2021.01-unstable-2021-09-22 according to Nix; versionComparison: -1