`nixinate is not a valid system type`

nix flake show:

git+file:///home/qd/Dropbox/dotfiles?ref=refs%2fheads%2fmain&rev=a03c76c10699de7315365dd6f0faa792e2a2fbff
├───apps
│   └───nixinate
│       ├───herc-agent: app
│       └───herc-agent-dry-run: app

my flake

Everything works (including deployment) except for nix flake check, which is borked.

qd@fw ~/D/dotfiles (main) [1]> nix flake check --show-trace
error: 'nixinate' is not a valid system type, at /nix/store/lamv8sjrhqznfacw4qxy4p4q2rjxi4yg-source/flake.nix:70:14

       … while checking flake output 'apps'

       at /nix/store/97c4ljj5afikynn9nsqzs5b6mwx79n1f-source/flake.nix:58:7:

           57|     in {
           58|       apps = nixinate.nixinate.${machines.common.system} self;
             |       ^
           59|

MatthewCroughan / nixinate

`nixinate is not a valid system type` #31