Flake lock file changes: • Updated input 'nixpkgs': 'github:NixOS/nixpkgs/16bf3980bfa0d8929639be93fa8491ebad9d61ec' (2021-08-01) → 'github:NixOS/nixpkgs/f0869b1a2c0b150aac26e10bb5c2364ffb2e804f' (2021-10-31)