Mh maybe you misunderstood the announcment. This is for the QtCreator plugin
for editing/building/debugging nim code and not a Qt port.
See https://www.youtube.com/watch?v=fLDAvovZTPY
Going off topic:
Regarding the Qt bindings i'm also the author of the NimQml bindings: see
https://www.youtube.com/watch?v=8Ps0vJT0lWU
and https://github.com/filcuc/DOtherSide and https://github.com/filcuc/nimqml
You can install them with nimble.