Issue adding plugin on Cordova 5.1.1

I have an error adding the plugin on Cordova 5.1.1
$ cordova plugin add https://github.com/phonegap-build/PushPlugin.git
Fetching plugin "https://github.com/phonegap-build/PushPlugin.git" via git clone
Repository "https://github.com/phonegap-build/PushPlugin.git" checked out to git ref "master".
shell.js: internal error
Error: EXDEV, cross-device link not permitted '/var/folders/8h/n9m0s_2x5mxby9qy8kvyz3kr0000gp/T/git/1435359586765/Example'
at Object.fs.renameSync (fs.js:554:18)
at /usr/local/lib/node_modules/cordova/node_modules/cordova-lib/node_modules/shelljs/src/mv.js:77:8
at Array.forEach (native)
at Object._mv (/usr/local/lib/node_modules/cordova/node_modules/cordova-lib/node_modules/shelljs/src/mv.js:53:11)
at Object.mv (/usr/local/lib/node_modules/cordova/node_modules/cordova-lib/node_modules/shelljs/src/common.js:186:23)
at /usr/local/lib/node_modules/cordova/node_modules/cordova-lib/src/plugman/util/plugins.js:53:19
at _fulfilled (/usr/local/lib/node_modules/cordova/node_modules/q/q.js:787:54)
at self.promiseDispatch.done (/usr/local/lib/node_modules/cordova/node_modules/q/q.js:816:30)
at Promise.promise.promiseDispatch (/usr/local/lib/node_modules/cordova/node_modules/q/q.js:749:13)
at /usr/local/lib/node_modules/cordova/node_modules/q/q.js:557:44

Start by reproducing the `cordova plugin add` command with Cordova 5.1.1 and trace the failure through `shell.js` and `cordova-lib/src/plugman/util/plugins.js`, the paths named in the stack trace. Done means the PushPlugin repository can be added without the EXDEV error, with coverage for this cross-device move case if the project’s tests support it.

Written by the indexing model from the issue text.