Flake lock file updates: • Updated input 'nixpkgs': 'github:NixOS/nixpkgs/9222ae36b208d1c6b55d88e10aa68f969b5b5244' (2022-02-23) → 'github:NixOS/nixpkgs/f1c9c23aad972787f00f175651e4cb0d7c7fd5ea' (2022-06-01)