import 'redux-saga/effects': CustomError: ERR_UNSUPPORTED_DIR_IMPORT

[huan]

The Problem

When running under ES Modules mode:

$ node --no-warnings --loader=ts-node/esm ./src/ducks/ducks.spec.ts 
/Users/huan/git/huan/ducks/node_modules/ts-node/dist-raw/node-esm-resolve-implementation.js:379
    const err = new ERR_UNSUPPORTED_DIR_IMPORT(path, fileURLToPath(base));
                ^
CustomError: ERR_UNSUPPORTED_DIR_IMPORT /Users/huan/git/huan/ducks/node_modules/redux-saga/effects /Users/huan/git/huan/ducks/examples/ping-pong/sagas.ts

ducks/examples/ping-pong/sagas.spec.ts

Lines 22 to 25 in d96f35b

	import {
	takeEvery,
	put,
	} from 'redux-saga/effects'

The Workaround

To disable saga temporarily and will investigate in the future.