javascript-obfuscator: Misleading Exception

When I want to obfuscate one directory like this: javascript-obfuscator <srcDir> --output <destDir> --config <myConfig> If in my config I assign value to sourceMapFileName , then an exception thown:

----- now run cmd: 'javascript-obfuscator dist\dev-bundle       --output dist\prod-bundle       --config buildScripts\obfuscate.config.json' -----
Error: EPERM: operation not permitted, mkdir 'D:\'
    at Object.mkdirSync (fs.js:947:3)
    at mkdirpNativeSync (D:\workspace\HiEarthSdk\node_modules\mkdirp\lib\mkdirp-native.js:25:17)
    at Object.sync (D:\workspace\HiEarthSdk\node_modules\mkdirp\index.js:21:7)
    at t.ObfuscatedCodeWriter.writeFile (D:\workspace\HiEarthSdk\node_modules\javascript-obfuscator\dist\webpack:\JavaScriptObfuscator\src\cli\utils\ObfuscatedCodeWriter.ts:82:16)
    at j.apply (D:\workspace\HiEarthSdk\node_modules\javascript-obfuscator\dist\webpack:\JavaScriptObfuscator\src\cli\JavaScriptObfuscatorCLI.ts:195:39)
    at j.processSourceCodeWithSourceMap (D:\workspace\HiEarthSdk\node_modules\javascript-obfuscator\dist\webpack:\JavaScriptObfuscator\src\decorators\Initializable.ts:61:39)
    at j.apply (D:\workspace\HiEarthSdk\node_modules\javascript-obfuscator\dist\webpack:\JavaScriptObfuscator\src\cli\JavaScriptObfuscatorCLI.ts:178:18)
    at j.processSourceCode (D:\workspace\HiEarthSdk\node_modules\javascript-obfuscator\dist\webpack:\JavaScriptObfuscator\src\decorators\Initializable.ts:61:39)
    at D:\workspace\HiEarthSdk\node_modules\javascript-obfuscator\dist\webpack:\JavaScriptObfuscator\src\cli\JavaScriptObfuscatorCLI.ts:165:22
    at Array.forEach (<anonymous>)
(node:6204) UnhandledPromiseRejectionWarning: Error: Command failed: javascript-obfuscator dist\dev-bundle       --output dist\prod-bundle       --config buildScripts\obfuscate.config.jso
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The exception is too terrible and I found out reason after one day…

Expected Behavior

So when obfuscating one directory the option sourceMapFileName should not be set? If set I want get correct prompt… Thanks!

Your Environment

• Obfuscator version used: windows10
• Node version used: v14.10.0