prebuild-install  ERROR: Repository not found

package.json contains

```
prebuild-install": "6.1.4"
```

but `npm i -E @modum-io/modblue` results in `fatal: Could not read from remote repository.`

and, sure enough,  [github.com/valandur/prebuild-install.git](github.com/valandur/prebuild-install.git) doesn't seem to exist any more.

How to proceed?
