when I check the module it's complaining about, I do own it, but the permissions are different from other modules somehow.

drwxr-xr-x     6 paul.yau  staff     192 Oct  4 11:26 npm-imagemin-mozjpeg-7.0.0-d926477fc6ef5f3a768a4222f7b2d808d3eba568
drw-rw-rw-     3 paul.yau  staff      96 Jul 27 08:57 npm-imagemin-webpack-plugin-2.2.0-e9c6b3223c979bd50a81c9f8b3741e6f420a54e8

The bottom one is the offending module