npm install failed

[crapthings]

npm verb stack Error: ENOENT: no such file or directory, chmod '/Users/monsterstep/dev/parcel-playground/ot/server/node_modules/y-websocket/bin/server.js'
npm verb cwd /Users/monsterstep/dev/parcel-playground/ot/server
npm verb Darwin 18.6.0
npm verb argv "/Users/monsterstep/.nvm/versions/node/v10.15.0/bin/node" "/Users/monsterstep/.nvm/versions/node/v10.15.0/bin/npm" "i" "-S" "y-websocket" "--verbose"
npm verb node v10.15.0
npm verb npm  v6.9.0
npm ERR! path /Users/monsterstep/dev/parcel-playground/ot/server/node_modules/y-websocket/bin/server.js
npm ERR! code ENOENT
npm ERR! errno -2
npm ERR! syscall chmod
npm ERR! enoent ENOENT: no such file or directory, chmod '/Users/monsterstep/dev/parcel-playground/ot/server/node_modules/y-websocket/bin/server.js'
npm ERR! enoent This is related to npm not being able to find a file.
npm ERR! enoent
npm verb exit [ -2, true ]

_{Huly®: YJS-476}

[dmonad]

You need to give me more information. Clearly npm i y-websocket and npm i y-websocket@next works on my system.