[Bug]: including a referenced tsconfig.json won't compile

[Raffaello]

Version

27.1.3

Steps to reproduce

1. include a referenced project in tsconfig.json and the referenced to be composite
2. use some of the referenced project in the test,
3. you will have the error

Unable to process '', please make sure that `outDir` in your tsconfig is neither `''` or `'.'`. You can also configure Jest config option `transformIgnorePatterns` to inform `ts-jest` to transform [filename].ts

outDir of course is set up.

Expected behavior

it should transpile the .ts file with the imported stuff from the referenced repo.

Actual behavior

it doesn't work.

Unable to process '', please make sure that `outDir` in your tsconfig is neither `''` or `'.'`. You can also configure Jest config option `transformIgnorePatterns` to inform `ts-jest` to transform [filename].ts

Debug log

.

Additional context

No response

Environment

.

[ahnpnl]

Duplicate with #1648