tsconfig-build.json

{
    "compilerOptions": {
        "rootDir": ".",
        "baseUrl": ".",
        "paths": {
            "@angular/*": [
                "../../node_modules/@angular/*"
            ],
            "@rxjs/*": [
                "../../node_modules/rxjs/*"
            ]
        },
        "outDir": "../",
        "declaration": true,
        "strict": true,
        "strictPropertyInitialization": false,
        "moduleResolution": "node",
        "module": "es2015",
        "target": "es2015",
        "lib": [
            "es2015",
            "dom"
        ],
        "skipLibCheck": true,
        "types": [],
        "experimentalDecorators": true,
        "emitDecoratorMetadata": true,
        "sourceMap": true,
        "inlineSources": true,
        "importHelpers": true
    },
    "files": [
        "public_api.ts",
        "../../node_modules/zone.js/dist/zone.js.d.ts"
    ],
    "angularCompilerOptions": {
        "enableResourceInlining": true,
        "skipTemplateCodegen": true,
        "annotateForClosureCompiler": true,
        "strictMetadataEmit": true,
        "flatModuleOutFile": "agm-direction.js",
        "flatModuleId": "agm-direction"
    }
}