Heft won't run ESM jest test

This rush monorepo contains a single package called lib.

It has type: "module" set in the package.json (meaning it interprets .js files as ESM).

Reproducing the issue

Install dependencies

rush update

Running the build

cd packages/lib
rushx build

Running with jest alone

rushx jest-only        # tests run with ESM

Running with Heft

rushx heft-breaks      # breaks because heft somehow ignores NODE_OPTIONS=--experimental-vm-modules 

Conclusion

Heft somehow ignores somehow ignores NODE_OPTIONS=--experimental-vm-modules, which Jest needs in order to run ESM.