Only for build tools.
A patched version of the module that drastically improves the time it takes to check for cycles in the package dependency graph (5 minutes down to 1 second).
Uses a cache to avoid checking the same node twice. Submitted upstream as: lerna/lerna#2874
Before:
$ time node_modules/.bin/lerna exec pwd
...
lerna success exec Executed command in 217 packages: "pwd"
273.24 real 272.27 user 2.04 sys
After:
$ time node_modules/.bin/lerna exec pwd
...
lerna success exec Executed command in 219 packages: "pwd"
1.11 real 0.99 user 0.82 sys