Error: Cannot find module '../proposal-realms/shim/src/realm.js'

[dckc]

The .travis.yml file suggests this should work, but I'm losing; I expect I know how to fix this, but I'm filing this on behalf of the next person in this position:

~/projects$ git clone https://github.com/Agoric/SES.git
...
Resolving deltas: 100% (363/363), done.

connolly@jambox:~/projects$ cd SES/
connolly@jambox:~/projects/SES$ npm install
npm notice created a lockfile as package-lock.json. You should commit this file.
added 41 packages from 53 contributors and audited 56 packages in 2.771s
found 0 vulnerabilities

connolly@jambox:~/projects/SES$ npm run test

> ses@0.1.3 test /home/connolly/projects/SES
> node scripts/build-intermediate.js && tape -r esm test/**/*.js

Use of eval is strongly discouraged, as it poses security risks and may cause issues with minification
Use of eval is strongly discouraged, as it poses security risks and may cause issues with minification
wrote 59242 to src/stringifiedBundle
file:///home/connolly/projects/SES/src/SES.js:1
Error: Cannot find module '../proposal-realms/shim/src/realm.js'
    at Object.<anonymous> (file:///home/connolly/projects/SES/src/SES.js:1)
npm ERR! code ELIFECYCLE
...


~/projects/SES$ git log -n 1  # What version am I testing?
commit 15ecf1520c8314f7ec29165548eccff1118e294d
Date:   Fri Aug 24 16:41:06 2018 -0700

[dckc]

tee hee... I see the git submodule now.

Worth a mention in the README?

[warner]

Agoric/SES#21 should fix this, I think.