[Fixed] Error Debug Failure. False expression: import= for internal module references should be handled in an earlier transformer – Javascript

The Problem:

During the Nest build script, the error "Debug Failure. False expression: import= for internal module references should be handled in an earlier transformer" occurs. I am not clear what this error means and how to rectify it to successfully complete the Nest build phase.

The Solutions:

Solution 1: Downgrade TypeScript version

The issue is caused by a breaking change in TypeScript 5.2, which affects the way modules are emitted in declaration files. Webpack 5.88.2, which is a dependency of NestJS, seems to be incompatible with this change.

To resolve the error, you can temporarily downgrade your TypeScript version to 5.1.6. This should allow you to successfully build your NestJS application.

To downgrade TypeScript, run the following command:

npm install [email protected]

After downgrading TypeScript, you should be able to build your NestJS application without encountering the error.

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