With this WIP patch: https://salsa.debian.org/js-team/node-yarnpkg/-/blob/master/debian/patches/18-uuid.diff
I can do: rm -rf /tmp/test mkdir -p /tmp/test/foo cd /tmp/test yes '' | yarn init cd foo yes '' | yarn init cd .. yarn add file:foo and get: yarn add v1.22.10 info No lockfile found. [1/4] Resolving packages... [2/4] Fetching packages... [3/4] Linking dependencies... [4/4] Building fresh packages... success Saved lockfile. success Saved 1 new dependency. info Direct dependencies └─ foo@1.0.0 info All dependencies └─ foo@1.0.0 Done in 0.25s. Paolo