They fixed the issue with extract-zip. Thanks.

I tried this with NodeJs 6 and 7. This happened today. Last week I installed it without problems on another Pi 3.

These are the errors.

Error: ENOENT: no such file or directory, lstat '~/MagicMirror/node_modules/electron/dist/resources'

Error: ENOENT: no such file or directory, lstat '/opt/MagicMirror/node_modules/electron/dist/resources'
npm WARN grunt-stylelint@0.8.0 requires a peer of stylelint@^7.8.0 but none was installed.
npm WARN stylelint-config-standard@16.0.0 requires a peer of stylelint@^7.8.0 but none was installed.
npm ERR! Linux 4.4.50-v7+
npm ERR! argv "/usr/bin/nodejs" "/usr/bin/npm" "install"
npm ERR! node v7.9.0
npm ERR! npm  v4.2.0
npm ERR! code ELIFECYCLE
npm ERR! errno 1

npm ERR! electron@1.6.6 postinstall: `node install.js`
npm ERR! Exit status 1
npm ERR! 
npm ERR! Failed at the electron@1.6.6 postinstall script 'node install.js'.
npm ERR! Make sure you have the latest version of node.js and npm installed.
npm ERR! If you do, this is most likely a problem with the electron package,
npm ERR! not with npm itself.
npm ERR! Tell the author that this fails on your system:
npm ERR!     node install.js
npm ERR! You can get information on how to open an issue for this project with:
npm ERR!     npm bugs electron
npm ERR! Or if that isn't available, you can get their info via:
npm ERR!     npm owner ls electron
npm ERR! There is likely additional logging output above.

npm ERR! Please include the following file with any support request:
npm ERR!     /root/.npm/_logs/2017-04-30T22_56_16_822Z-debug.log

I’m having the same issue here today. I installed it on a different Pi 3 last week and it worked. I have not made any changes to the way I install the package as I used a Chef recipe to do the same thing on both. Today, MagicMirror can’t install completely.