Run gulp in engine folder failed.

[SchumyHao]

I cloned the repo.
run npm i in engine folder
run gulp failed.

gulp
[13:51:25] Using gulpfile ~/git/ioBroker.docs/engine/gulpfile.js
[13:51:25] Starting 'default'...
[13:51:25] Starting '0.clean'...
[13:51:25] Finished '0.clean' after 2.48 ms
[13:51:25] Starting '1.blog'...
(node:47951) UnhandledPromiseRejectionWarning: Error: ENOENT: no such file or directory, mkdir
    at Object.mkdirSync (fs.js:750:3)
    at parts.forEach.part (/home/schumy/git/ioBroker.docs/engine/build-lib/utils.js:110:46)
    at Array.forEach (<anonymous>)
    at createDir (/home/schumy/git/ioBroker.docs/engine/build-lib/utils.js:108:11)
    at Object.writeSafe (/home/schumy/git/ioBroker.docs/engine/build-lib/utils.js:118:5)
    at fs.readdirSync.forEach.item (/home/schumy/git/ioBroker.docs/engine/build-lib/blog.js:80:27)
    at Array.forEach (<anonymous>)
    at resolve (/home/schumy/git/ioBroker.docs/engine/build-lib/blog.js:13:52)
    at new Promise (<anonymous>)
    at build (/home/schumy/git/ioBroker.docs/engine/build-lib/blog.js:9:12)
(node:47951) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). (rejection id: 5)
(node:47951) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.
[13:51:25] The following tasks did not complete: default, 1.blog
[13:51:25] Did you forget to signal async completion?

I tired on OSX Linux, both failed.
Only success on Windows PC.

[SchumyHao]

This maybe caused by the root path with **/**home/schumy/git/ioBroker.docs/engine/build-lib/utils.js

This will be replaces in engine/build-lib/utils.js function writeSafe(fileName, data) const parts = fileName.replace(/\\/g, '/').split('/'); and become to ""