diff --git a/.github/workflows/integration.yml b/.github/workflows/integration.yml
index 20b8f1c4..4404fa4f 100644
--- a/.github/workflows/integration.yml
+++ b/.github/workflows/integration.yml
@@ -11,7 +11,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        ng: [latest, 10]
+        ng: [latest, 12]
     name: Build app with @angular/cli
     steps:
       - uses: actions/checkout@v2
diff --git a/integrations/package.json b/integrations/package.json
index fe28d9bc..939061f4 100644
--- a/integrations/package.json
+++ b/integrations/package.json
@@ -5,11 +5,11 @@
   "description": "Some script examples",
   "scripts": {
     "build:latest": "npm run build:ng latest -prefix ../",
-    "build:ng10": "npm run build:ng 10 -prefix ../",
+    "build:ng12": "npm run build:ng 12 -prefix ../",
     "build:next": "npm run build:ng next -prefix ../",
     "test:latest": "npm run test -prefix latest",
     "clean": "npx rimraf ./*/",
     "serve:latest": "npx angular-http-server --path latest/dist/latest",
-    "serve:ng10": "npx angular-http-server --path ng10/dist/ng10"
+    "serve:ng12": "npx angular-http-server --path ng12/dist/ng12"
   }
 }
diff --git a/scripts/build.js b/scripts/build.js
index 01b8631b..b5a4c59d 100644
--- a/scripts/build.js
+++ b/scripts/build.js
@@ -1,9 +1,10 @@
 //@ts-check
 const { promises: fsp } = require('fs');
-const { build } = require('ng-packagr');
+const packagr = require('ng-packagr');
 
 async function buildPkg() {
   try {
+    const libPackagePath = 'src/uploadx/package.json';
     const rootPackage = JSON.parse(await fsp.readFile('package.json', 'utf8'));
     const libPackage = {};
     libPackage.name = rootPackage.name;
@@ -22,11 +23,15 @@ async function buildPkg() {
       dest: '../../dist/uploadx',
       deleteDestPath: true
     };
-    await fsp.writeFile('src/uploadx/package.json', JSON.stringify(libPackage, undefined, 2));
-    await build({ project: 'src/uploadx/package.json' });
+    await fsp.writeFile(libPackagePath, JSON.stringify(libPackage));
+    await packagr
+      .ngPackagr()
+      .forProject(libPackagePath)
+      .withTsConfig('src/uploadx/tsconfig.lib.json')
+      .build();
     await fsp.copyFile('LICENSE', 'dist/uploadx/LICENSE');
     await fsp.copyFile('README.md', 'dist/uploadx/README.md');
-    await fsp.unlink('src/uploadx/package.json');
+    await fsp.unlink(libPackagePath);
   } catch (error) {
     console.error(error);
     process.exit(1);
diff --git a/src/uploadx/tsconfig.lib.json b/src/uploadx/tsconfig.lib.json
new file mode 100644
index 00000000..6f9eeabc
--- /dev/null
+++ b/src/uploadx/tsconfig.lib.json
@@ -0,0 +1,25 @@
+{
+  "angularCompilerOptions": {
+    "compilationMode": "partial",
+    "strictTemplates": true,
+    "enableResourceInlining": true
+  },
+  "buildOnSave": false,
+  "compileOnSave": false,
+  "compilerOptions": {
+    "baseUrl": ".",
+    "target": "es2015",
+    "module": "es2015",
+    "moduleResolution": "node",
+    "outDir": "",
+    "declaration": true,
+    "inlineSourceMap": true,
+    "inlineSources": true,
+    "skipLibCheck": true,
+    "emitDecoratorMetadata": false,
+    "experimentalDecorators": true,
+    "importHelpers": true,
+    "lib": ["dom", "es2018"]
+  },
+  "exclude": ["node_modules", "dist", "**/*.ngfactory.ts", "**/*.shim.ts", "**/*.spec.ts"]
+}