Flake lock file updates: • Updated input 'nixpkgs': 'github:nixos/nixpkgs/671fabc93b4d1a3b38499c7b20776477c91b2b15' (2022-09-30) → 'github:nixos/nixpkgs/c6b3881520feb0c837cf5ae16d95d32277f41f60' (2022-09-30)