fs.mkdir isn't recursive and download fails

[blues-man]

Describe the bug
Hello, I'm trying to add this extension as Kotlin plugin for Eclipse Che using Eclipse Theia supporting VSCode extensions, but I can't have it working because download of extension is failing due this code snippet can't create recursively the path:

vscode-kotlin/src/serverDownloader.ts

Line 61 in bd965d6

await fs.promises.mkdir(this.installDir, { recursive: true });

Error I get is:

Activating extension 'Kotlin' failed: ENOENT: no such file or directory,
mkdir '/home/theia/home/theia/fwcd.kotlin'

so context.defaultGlobalStorage lands to /home/theia/home/theia, while only /home/theia exists.

Shoudn't fs.mkdir with recursive=true create it anyway?
https://nodejs.org/dist/latest-v10.x/docs/api/fs.html#fs_fs_mkdir_path_options_callback

Is there any way to pass the installDir as parameter from package.json ?
To Reproduce
PR open with all details and how to reproduce it:
eclipse-che/che-plugin-registry#611

Expected behavior
ServerDownloader.installDir is created on Eclipse Che using this VSCode extension

Extension version
0.2.18