error:
       … while evaluating the attribute 'optionalValue.value'
         at «git+https://github.com/SBEE-Lab/nixpkgs?ref=main&rev=26e35aa273febba0db3ab1e3f95e314eadfc6991&shallow=1»/lib/modules.nix:1312:5:
         1311|
         1312|     optionalValue = if isDefined then { value = mergedValue; } else { };
             |     ^
         1313|   };

       … while evaluating a branch condition
         at «git+https://github.com/SBEE-Lab/nixpkgs?ref=main&rev=26e35aa273febba0db3ab1e3f95e314eadfc6991&shallow=1»/lib/modules.nix:1312:21:
         1311|
         1312|     optionalValue = if isDefined then { value = mergedValue; } else { };
             |                     ^
         1313|   };

       … while evaluating definitions from `/nix/store/xfg4bws749i95jvnxhymxmfwailzk38q-source/modules/transposition.nix':

       … while evaluating definitions from `/nix/store/x8apg5cvfmhk1l4v3mrp47z89bif3p62-source/checks/flake-module.nix, via option perSystem':

       … while evaluating the option `system.build.toplevel':

       … while evaluating definitions from `/nix/store/vb46447j2a668vg5v2n8d5b6zbalp7b1-source/nixos/modules/system/activation/top-level.nix':

       … while evaluating the option `assertions':

       … while evaluating definitions from `/nix/store/x8apg5cvfmhk1l4v3mrp47z89bif3p62-source/modules/gatus/check.nix':

       … while evaluating the option `gatusCheck.push':

       … while evaluating definitions from `/nix/store/x8apg5cvfmhk1l4v3mrp47z89bif3p62-source/modules/rustfs/monitoring.nix':

       (stack trace truncated; use '--show-trace' to show the full, detailed trace)

       error: The option `services.rustfs.enable' in `/nix/store/vb46447j2a668vg5v2n8d5b6zbalp7b1-source/nixos/modules/services/web-servers/rustfs.nix' is already declared in `/nix/store/x8apg5cvfmhk1l4v3mrp47z89bif3p62-source/modules/rustfs/options.nix'.