How can one import an ESM module from REPL?

[oatmealb]

Here's a quickly reproducible sample repo:

docker run -d --rm -it -e POSTGRES_PASSWORD=postgres -e POSTGRES_DB=db -ePOSTGRES_USER=postgres -p 5433:5432 --name pg postgres:14.6-alpine3.17
npm install
# 1) This works ...
set -a && source ./.env && ts-node src/foo.ts
# 2) ... but this, inside ts-node REPL, does NOT:
> foo = await import('./src/foo.ts')

How can an ESM module imported? I'd be grateful for any variation (await import, import foo from ..., etc.) as long as I get to keep "type": "module" in package.json.

(I've already also asked on StackOverflow with my attempts more fully written out; though the repro project fully encompasses my issue.)