I am also facing the same issue,
when I try to install by npm.
> npm I @grafana/toolkit > npm ERR! code E404 > npm ERR! 404 Not Found - GET https://registry.npmjs.org/@grafana/toolkit/-/toolkit-8.2.1.tgz
**> npm ERR! 404 ** > npm ERR! 404 ‘@grafana/toolkit@latest’ is not in the npm registry. > npm ERR! 404 You should bug the author to publish it (or use the name yourself!)
**> npm ERR! 404 ** > npm ERR! 404 Note that you can also install from an > npm ERR! 404 tarball, folder, HTTP URL, or git URL.
**> ** > npm ERR! A complete log of this run can be found in: > npm ERR! /home/karthik/.npm/_logs/2021-10-13T06_40_46_360Z-debug.log