[BUG] npm_package_from not set in lifecycle

https://github.com/npm/rfcs/blob/d2f8dc3cbf35217a31d1bb5491154b18d4fb2276/implemented/0021-reduce-lifecycle-script-environment.md

the rfc that got rid of most of the environment variables states there will be an npm_package_from variable in when a package is being installed. there isn't. npm_package_resolved, and npm_package_integrity are there.

npm_package_from is not.

current behaviour

npm_package_from not set in install lifecycle hook

expected behaviour

npm_package_from would be set in install lifecycle hook

steps

• npm install @chee/yeet 2>&1 | grep npm_package
• look at the output, and note there is no npm_package_from
  the install script of that package is env && false

Environment:

• os: arch linux version 200 and something
• node: 15.10.0
• npm: 7.6.0