vagrant@vagrant:/vagrant/mediawiki$ node -v
v6.16.0

vagrant@vagrant:/vagrant/mediawiki$ npm -v
2.15.12

vagrant@vagrant:/vagrant/mediawiki$ npm i
npm WARN peerDependencies The peer dependency karma@^0.13.0 || ^1.0.0 included from grunt-karma will no
npm WARN peerDependencies longer be automatically installed to fulfill the peerDependency 
npm WARN peerDependencies in npm 3+. Your application will need to depend on it explicitly.
npm WARN peerDependencies The peer dependency stylelint@^9.0.0 included from grunt-stylelint will no
npm WARN peerDependencies longer be automatically installed to fulfill the peerDependency 
npm WARN peerDependencies in npm 3+. Your application will need to depend on it explicitly.
npm WARN deprecated nomnom@1.8.1: Package no longer supported. Contact support@npmjs.com for more info.
npm WARN optional dep failed, continuing fsevents@1.2.7
npm WARN deprecated circular-json@0.5.9: CircularJSON is in maintenance only, flatted is its successor.
 
> fibers@2.0.2 install /vagrant/mediawiki/node_modules/wdio-mocha-framework/node_modules/wdio-sync/node_modules/fibers
> node build.js || nodejs build.js

`linux-x64-48` exists; testing
Binary is fine; exiting
npm WARN deprecated core-js@1.2.7: core-js@<2.6.5 is no longer maintained. Please, upgrade to core-js@3 or at least to actual version of core-js@2.
npm WARN deprecated circular-json@0.3.3: CircularJSON is in maintenance only, flatted is its successor.
npm WARN deprecated boom@4.3.1: This version is no longer maintained. Please upgrade to the latest version.
\
> sauce-connect-launcher@1.2.5 postinstall /vagrant/mediawiki/node_modules/wdio-sauce-service/node_modules/sauce-connect-launcher
> node scripts/install.js || nodejs scripts/install.js

npm ERR! Linux 4.9.0-8-amd64
npm ERR! argv "/usr/bin/node" "/usr/bin/npm" "i"
npm ERR! node v6.16.0
npm ERR! npm  v2.15.12
npm ERR! code EPEERINVALID

npm ERR! peerinvalid The package karma@3.1.4 does not satisfy its siblings' peerDependencies requirements!
npm ERR! peerinvalid Peer grunt-karma@3.0.0 wants karma@^0.13.0 || ^1.0.0
npm ERR! peerinvalid Peer karma-mocha-reporter@2.2.5 wants karma@>=0.13

npm ERR! Please include the following file with any support request:
npm ERR!     /vagrant/mediawiki/npm-debug.log