Uncaught ReferenceError: exports is not defined

[rlyttle]

Getting Uncaught ReferenceError: exports is not defined upon loading my webapp

Details

Angular 12 webapp
In package.json: "changedpi": "^1.0.4",
"node_modules/changedpi/dist/index.js" added to angular.json under architect.build.scripts
declare module 'changedpi' added to src/typings.d.ts
Imported into component using import * as changedpi from 'changedpi';

Upon loading webapp:

Clicking on error shows source:

Can anyone advise if I've integrated incorrectly, or if there's an underlying issue in the library?