npm i web3 gives permission denied error

[whitneygriffith]

33 verbose node v8.11.2
34 verbose npm v5.6.0
35 error code 1
36 error Command failed: /usr/local/bin/git clone -q https://github.com/frozeman/bignumber.js-nolookahead.git /Users/t-whgri/.npm/_cacache/tmp/git-clone-1e15a942
36 error /Users/t-whgri/.npm/_cacache/tmp/git-clone-1e15a942/.git: Permission denied
37 verbose exit [ 1, true ]

[gaeml-hoo]

can't get it down
npm ERR! undefined ls-remote -h -t https://github.com/frozeman/bignumber.js-nolookahead.git

[adrirod]

i have the same error, any updates on this?