No matter what I try, every time I try to install polymer-cli, it always comes up with a PERMISSION_DENIED error.
bradley@gurulaptop:~$ sudo npm -g install polymer-cli
npm WARN deprecated bower@1.8.0: ..psst! While Bower is maintained, we recommend Yarn and Webpack for *new* front-end projects! Yarn's advantage is security and reliability, and Webpack's is support for both CommonJS and AMD projects. Currently there's no migration path but we hope you'll help us figure out one.
npm WARN deprecated @types/assert@0.0.29: See https://github.com/DefinitelyTyped/DefinitelyTyped/issues/12826
/usr/bin/polymer -> /usr/lib/node_modules/polymer-cli/bin/polymer.js
> wd@1.2.0 install /usr/lib/node_modules/polymer-cli/node_modules/wd
> node scripts/build-browser-scripts
/usr/lib/node_modules/polymer-cli/node_modules/mkdirp/index.js:90
throw err0;
^
Error: EACCES: permission denied, mkdir '/usr/lib/node_modules/polymer-cli/node_modules/wd/build'
at Object.fs.mkdirSync (fs.js:877:18)
at sync (/usr/lib/node_modules/polymer-cli/node_modules/mkdirp/index.js:71:13)
at Object.<anonymous> (/usr/lib/node_modules/polymer-cli/node_modules/wd/scripts/build-browser-scripts.js:6:1)
at Module._compile (module.js:569:30)
at Object.Module._extensions..js (module.js:580:10)
at Module.load (module.js:503:32)
at tryModuleLoad (module.js:466:12)
at Function.Module._load (module.js:458:3)
at Function.Module.runMain (module.js:605:10)
at startup (bootstrap_node.js:158:16)
npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! wd@1.2.0 install: `node scripts/build-browser-scripts`
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the wd@1.2.0 install script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.
npm ERR! A complete log of this run can be found in:
npm ERR! /home/bradley/.npm/_logs/2017-06-06T13_10_23_400Z-debug.log
How can I solve this?