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├── projects
│   ├── my-app
│   │   ├── karma.conf.js
│   │   ├── src
│   │   ├── tsconfig.app.json
│   │   └── tsconfig.spec.json
│   └── my-lib
│       ├── README.md
│       ├── karma.conf.js
│       ├── ng-package.json
│       ├── node_modules
│       ├── package-lock.json
│       ├── package.json
│       ├── src
│       ├── tsconfig.lib.json
│       ├── tsconfig.lib.prod.json
│       └── tsconfig.spec.json
└── tsconfig.json

 {
  "compileOnSave": false,
  "compilerOptions": {
    "baseUrl": "./",
    "outDir": "./dist/out-tsc",
    "forceConsistentCasingInFileNames": true,
    "strict": true,
    "noImplicitOverride": true,
    "noPropertyAccessFromIndexSignature": true,
    "noImplicitReturns": true,
    "noFallthroughCasesInSwitch": true,
    "sourceMap": true,
    "paths": {
      "my-lib": [
        "dist/my-lib/my-lib",
        "dist/my-lib"
      "@services/*": [
        "projects/my-lib/src/lib/services/*"
    "declaration": false,
    "downlevelIteration": true,
    "experimentalDecorators": true,
    "moduleResolution": "node",
    "importHelpers": true,
    "target": "es2017",
    "module": "es2020",
    "lib": [
      "es2020",
      "dom"
  "angularCompilerOptions": {
    "enableI18nLegacyMessageIdFormat": false,
    "strictInjectionParameters": true,
    "strictInputAccessModifiers": true,
    "strictTemplates": true
}

{
    "compileOnSave": false,
    "compilerOptions": {
      "baseUrl": "./",
      "outDir": "./dist/out-tsc",
      "paths": {
        "@services/*": [ "src/lib/services/*" ],
      "sourceMap": true,
      "declaration": false,
      "module": "es2015",
      "moduleResolution": "node",
      "emitDecoratorMetadata": true,
      "experimentalDecorators": true,
      "target": "es5",
      "typeRoots": [
        "node_modules/@types"
      "lib": [
        "es2017",
        "dom"
  }

{
  "$schema": "./node_modules/@angular/cli/lib/config/schema.json",
  "version": 1,
  "newProjectRoot": "projects",
  "projects": {
    "my-lib": {
      "projectType": "library",
      "root": "projects/my-lib",
      "sourceRoot": "projects/my-lib/src",
      "prefix": "lib",
      "architect": {
        "build": {
          "builder": "@angular-devkit/build-angular:ng-packagr",
          "options": {
            "project": "projects/my-lib/ng-package.json"
          "configurations": {
            "production": {
              "tsConfig": "projects/my-lib/tsconfig.lib.prod.json"
            "development": {
              "tsConfig": "projects/my-lib/tsconfig.lib.json"
          "defaultConfiguration": "production"

./node_modules/my-lib/fesm2015/my-lib.mjs:11:0-56 - Error: Module not found: Error: Can't resolve '@services/my-lib/my-lib.service' in '/Users/***/projects/ANGULAR/angular-tour-of-heroes/node_modules/my-lib/fesm2015'
    Error: node_modules/my-lib/lib/custom-page/custom-page.component.d.ts:2:30 - error TS2307: Cannot find module '@services/my-lib/my-lib.service' or its corresponding type declarations.