ng build cannot find module

I am trying to locally test 3 node modules by updating the locations they are being pulled from in their package.json files. The modules are sdk, ng-widget-lib, and frontend. ng-widget-lib depends on sdk and frontend depends on ng-widget-lib. I build sdk locally with babel. I'm running verdaccio as a local npm registry.

I update ng-widget/package.json (the name of the repo/root directory is ng-widget not ng-widget-lib) changing the name to @locals/ng-widget-lib and point the sdk dependency to the local sdk directory. Then run npm install and build with ng build which runs successfully. I then change the name in dist/package.json to @locals/ng-widget-lib and publish to my local registry.

In frontend/package.json I point the ng-widget-lib dependency to @locals/ng-widget-lib (I have tried pointing it to the local directory and not using the local registry but this still doesn't work). I run npm install which downloads the module from my local registry to node_modules/@locals/ng-widget-lib and creates a package-lock.json with ng-widget-lib pointing to the local registry. Then when I run ng build --prod or ng build it fails in the files where I'm importing @locals/ng-widget-lib with error

error TS2307: Cannot find module '@locals/ng-widget-lib'.

I have deleted node_modules and run npm cache clean --force but still the same error. The ng-widget-lib and frontend use angular 8, sdk is typescript. I'm using npm 6.11.3

Here is my tsconfig.json

{
  "compileOnSave": false,
  "compilerOptions": {
    "baseUrl": "./",
    "outDir": "./dist/out-tsc",
    "sourceMap": true,
    "declaration": false,
    "downlevelIteration": true,
    "experimentalDecorators": true,
    "module": "esnext",
    "moduleResolution": "node",
    "importHelpers": true,
    "target": "es5",
    "typeRoots": [
      "node_modules/@types"
    ],
    "lib": [
      "es2018",
      "dom"
    ]
  },
  "angularCompilerOptions": {
    "fullTemplateTypeCheck": true,
    "strictInjectionParameters": true
  }
}