Error generating EJS API documentation - node.js

Question

I have downloaded EJS master branch from https://github.com/mde/ejs and proceed to generate full public & private API docs throught the next indication:
This project uses JSDoc. For the full public API documentation, clone
the repository and run npm run doc. This will run JSDoc with the
proper options and output the documentation to out/. If you want the
both the public & private API docs, run npm run devdoc instead.
However i get a error related to jake, which is already installed.
npm-debug.log
0 info it worked if it ends with ok
1 verbose cli [ 'C:\\Program Files\\nodejs\\node.exe',
1 verbose cli 'C:\\Program Files\\nodejs\\node_modules\\npm\\bin\\npm-cli.js',
1 verbose cli 'run',
1 verbose cli 'devdoc' ]
2 info using npm#2.15.9
3 info using node#v4.6.0
4 verbose run-script [ 'predevdoc', 'devdoc', 'postdevdoc' ]
5 info predevdoc ejs#2.5.2
6 info devdoc ejs#2.5.2
7 verbose unsafe-perm in lifecycle true
8 info ejs#2.5.2 Failed to exec devdoc script
9 verbose stack Error: ejs#2.5.2 devdoc: `jake doc[dev]`
9 verbose stack Exit status 1
9 verbose stack at EventEmitter.<anonymous> (C:\Program Files\nodejs\node_modules\npm\lib\utils\lifecycle.js:217:16)
9 verbose stack at emitTwo (events.js:87:13)
9 verbose stack at EventEmitter.emit (events.js:172:7)
9 verbose stack at ChildProcess.<anonymous> (C:\Program Files\nodejs\node_modules\npm\lib\utils\spawn.js:24:14)
9 verbose stack at emitTwo (events.js:87:13)
9 verbose stack at ChildProcess.emit (events.js:172:7)
9 verbose stack at maybeClose (internal/child_process.js:829:16)
9 verbose stack at Process.ChildProcess._handle.onexit (internal/child_process.js:211:5)
10 verbose pkgid ejs#2.5.2
11 verbose cwd C:\Users\ \Desktop\ejs-master
12 error Windows_NT 6.1.7601
13 error argv "C:\\Program Files\\nodejs\\node.exe" "C:\\Program Files\\nodejs\\node_modules\\npm\\bin\\npm-cli.js" "run" "devdoc"
14 error node v4.6.0
15 error npm v2.15.9
16 error code ELIFECYCLE
17 error ejs#2.5.2 devdoc: `jake doc[dev]`
17 error Exit status 1
18 error Failed at the ejs#2.5.2 devdoc script 'jake doc[dev]'.
18 error This is most likely a problem with the ejs package,
18 error not with npm itself.
18 error Tell the author that this fails on your system:
18 error jake doc[dev]
18 error You can get information on how to open an issue for this project with:
18 error npm bugs ejs
18 error Or if that isn't available, you can get their info via:
18 error
18 error npm owner ls ejs
18 error There is likely additional logging output above.
19 verbose exit [ 1, true ]