pnpm/docs/recipes/shared-store.md

Shared store

Disclaimer! This will work only on Node.js >= v6.3.0, because it uses the --preserve-symlinks option (read more about it: nodejs/node#3402).

By default, pnpm creates a separate store for every package in it's node_modules folder. However, it is possible to change the value of the store-path config key and force pnpm to use a shared storage.

The easiest way to do it is via the command line:

pnpm config set store-path ~/.store

A shared storage can save tons of space!