these 2 derivations will be built: /nix/store/mcd7mddgs9fajgd5rvsn8whx7hmv0k97-flake-inputs.drv /nix/store/s3pczwqiam528frpzzanqgs75yzy7k5j-check-flake-inputs.drv building '/nix/store/mcd7mddgs9fajgd5rvsn8whx7hmv0k97-flake-inputs.drv' building '/nix/store/s3pczwqiam528frpzzanqgs75yzy7k5j-check-flake-inputs.drv' upload niks3: ok