npm Install failure: EACCES on ~/.npm/duplexify/3.5.0

[hoch]

I don't understand why npm install needs sudo here.

npm WARN deprecated node-uuid@1.4.7: use uuid module instead
npm ERR! Darwin 16.4.0
npm ERR! argv "/usr/local/bin/node" "/usr/local/bin/npm" "install"
npm ERR! node v6.9.0
npm ERR! npm  v3.10.8
npm ERR! path /Users/$USER/.npm/duplexify/3.5.0
npm ERR! code EACCES
npm ERR! errno -13
npm ERR! syscall mkdir

npm ERR! Error: EACCES: permission denied, mkdir '/Users/$USER/.npm/duplexify/3.5.0'
npm ERR!     at Error (native)
npm ERR!  { Error: EACCES: permission denied, mkdir '/Users/$USER/.npm/duplexify/3.5.0'
npm ERR!     at Error (native)
npm ERR!   errno: -13,
npm ERR!   code: 'EACCES',
npm ERR!   syscall: 'mkdir',
npm ERR!   path: '/Users/$USER/.npm/duplexify/3.5.0',
npm ERR!   parent: 'vinyl-fs' }
npm ERR!
npm ERR! Please try running this command again as root/Administrator.

Note: I am running macOS Sierra 10.12.3 (16D32). $USER is my home directory.

[chihuahua]

Hmm, I'm not certain either. That seems to relate to the global installation of a certain package. I thought that npm install was only supposed to update the node_modules directory local to the repo.

Maybe npm install also updates global packages while it's at it? I'm basically not sure ATM.

[chihuahua]

Maybe try running sudo chown -R $USER ~/.npm?

[hoch]

I know this is the permission problem, but I think the installation of extension project should not require the admin.

[chihuahua]

Yeah, I wonder why npm install is updating /Users/$USER/.npm. That's for global installations.