npm ERR! peerinvalid The package node-inspector does not satisfy its siblings’ peerDependencies requirements

Recently I was reinstalling ionic and cordova with:

npm install -g cordova ionic

but I got the following error:

    E:\IonicTesting>npm install -g cordova ionic
    npm WARN engine [email protected]: wanted: {"node":"~0.10.x"} (current: {"node":"0.12.7","npm":"2.11.3"})
    npm WARN engine [email protected]: wanted: {"node":">=0.6","npm":"1"} (current: {"node":"0.12.7","npm":"2.11.3"})
    npm WARN engine [email protected]: wanted: {"node":"0.8.x || 0.10.x"} (current: {"node":"0.12.7","npm":"2.11.3"})
    npm WARN engine [email protected]: wanted: {"node":"~0.10.x"} (current: {"node":"0.12.7","npm":"2.11.3"})
    npm WARN engine [email protected]: wanted: {"node":">=0.6","npm":"1"} (current: {"node":"0.12.7","npm":"2.11.3"})
    npm WARN installMany normalize-package-data was bundled with [email protected], but bundled package wasn't found in unpacked tre
    e
    C:\Users\Nikola\AppData\Roaming\npm\cordova -> C:\Users\Nikola\AppData\Roaming\npm\node_modules\cordova\bin\cordova
    npm WARN engine [email protected]: wanted: {"node":"0.8.x || 0.10.x"} (current: {"node":"0.12.7","npm":"2.11.3"})
    npm WARN installMany normalize-package-data was bundled with [email protected], but bundled package wasn't found in unpacked tre
    e
    C:\Users\Nikola\AppData\Roaming\npm\ionic -> C:\Users\Nikola\AppData\Roaming\npm\node_modules\ionic\bin\ionic
    npm WARN unmet dependency C:\Users\Nikola\AppData\Roaming\npm\node_modules\generator-ionic requires cordova@'^4.2.0' but
     will load
    npm WARN unmet dependency C:\Users\Nikola\AppData\Roaming\npm\node_modules\cordova,
    npm WARN unmet dependency which is version 5.1.1
    npm ERR! Windows_NT 6.1.7601
    npm ERR! argv "C:\\NodeJS\\\\node.exe" "C:\\NodeJS\\node_modules\\npm\\bin\\npm-cli.js" "install" "-g" "cordova" "ionic"
    
    npm ERR! node v0.12.7
    npm ERR! npm  v2.11.3
    npm ERR! code EPEERINVALID
    
    npm ERR! peerinvalid The package node-inspector does not satisfy its siblings' peerDependencies requirements!
    npm ERR! peerinvalid Peer [email protected] wants node-inspector@~0.7.0
    
    npm ERR! Please include the following file with any support request:
    npm ERR!     E:\IonicTesting\npm-debug.log

At first I thought the reason is that I may have had an older version of node or npm but wasn’t the case because my versions were up to date (date of this post: 03.08.2015):

E:\IonicTesting>node -v
v0.12.7

E:\IonicTesting>npm -v
2.11.3

Also, I did try:

npm update -g

and

npm cache clean

as noted in the few StackOverflow answers, but it didn’t help. After a bit of googling and messing around I realized (an idea came from this StackOverflow answer) that I could try uninstalling the dependencies which were messing with me:

npm uninstall -g node-inspector
npm uninstall -g strong-cli
npm install -g generator-karma

After this I ran

npm update -g

and then, to finally install Ionic and Cordova, I ran:

npm install -g cordova ionic

And, what do you know – it worked. Hope this helps someone!