hmmmm still the same thing. I nuked

.pants.d

,

~/.cache/pants

, and

~/Library/Caches

, though there was one folder that belongs to root, but Yarn belongs to me

error An unexpected error occurred: "<https://registry.yarnpkg.com/imagemin-webpack-plugin/-/imagemin-webpack-plugin-2.2.0.tgz>: EACCES: permission denied, mkdir '/Users/paul.yau/Library/Caches/Yarn/npm-imagemin-webpack-plugin-2.2.0-e9c6b3223c979bd50a81c9f8b3741e6f420a54e8/dist'".