diff --git a/app/angular/src/server/__mocks-ng-workspace__/with-lib/angular.json b/app/angular/src/server/__mocks-ng-workspace__/with-lib/angular.json
new file mode 100644
index 00000000000..1e9be4468f6
--- /dev/null
+++ b/app/angular/src/server/__mocks-ng-workspace__/with-lib/angular.json
@@ -0,0 +1,28 @@
+{
+  "$schema": "./node_modules/@angular/cli/lib/config/schema.json",
+  "version": 1,
+  "newProjectRoot": "projects",
+  "projects": {
+    "pattern-lib": {
+      "projectType": "library",
+      "root": "projects/pattern-lib",
+      "sourceRoot": "projects/pattern-lib/src",
+      "prefix": "lib",
+      "architect": {
+        "build": {
+          "builder": "@angular-devkit/build-angular:ng-packagr",
+          "options": {
+            "tsConfig": "projects/pattern-lib/tsconfig.lib.json",
+            "project": "projects/pattern-lib/ng-package.json"
+          },
+          "configurations": {
+            "production": {
+              "tsConfig": "projects/pattern-lib/tsconfig.lib.prod.json"
+            }
+          }
+        }
+      }
+    }
+  },
+  "defaultProject": "pattern-lib"
+}
diff --git a/app/angular/src/server/__mocks-ng-workspace__/with-lib/projects/pattern-lib/src/main.ts b/app/angular/src/server/__mocks-ng-workspace__/with-lib/projects/pattern-lib/src/main.ts
new file mode 100644
index 00000000000..63b661e3bd7
--- /dev/null
+++ b/app/angular/src/server/__mocks-ng-workspace__/with-lib/projects/pattern-lib/src/main.ts
@@ -0,0 +1,2 @@
+// To avoid "No inputs were found in config file" tsc error
+export const not = 'empty';
diff --git a/app/angular/src/server/__mocks-ng-workspace__/with-lib/projects/pattern-lib/tsconfig.lib.json b/app/angular/src/server/__mocks-ng-workspace__/with-lib/projects/pattern-lib/tsconfig.lib.json
new file mode 100644
index 00000000000..6e06ad542ed
--- /dev/null
+++ b/app/angular/src/server/__mocks-ng-workspace__/with-lib/projects/pattern-lib/tsconfig.lib.json
@@ -0,0 +1,25 @@
+/* To learn more about this file see: https://angular.io/config/tsconfig. */
+{
+  "extends": "../../tsconfig.json",
+  "compilerOptions": {
+    "outDir": "../../out-tsc/lib",
+    "target": "es2015",
+    "declaration": true,
+    "declarationMap": true,
+    "inlineSources": true,
+    "types": [],
+    "lib": [
+      "dom",
+      "es2018"
+    ]
+  },
+  "angularCompilerOptions": {
+    "skipTemplateCodegen": true,
+    "strictMetadataEmit": true,
+    "enableResourceInlining": true
+  },
+  "exclude": [
+    "src/test.ts",
+    "**/*.spec.ts"
+  ]
+}
diff --git a/app/angular/src/server/__mocks-ng-workspace__/with-lib/tsconfig.json b/app/angular/src/server/__mocks-ng-workspace__/with-lib/tsconfig.json
new file mode 100644
index 00000000000..ed46a09da32
--- /dev/null
+++ b/app/angular/src/server/__mocks-ng-workspace__/with-lib/tsconfig.json
@@ -0,0 +1,13 @@
+{
+  "compilerOptions": {
+    "sourceMap": true,
+    "moduleResolution": "node",
+    "emitDecoratorMetadata": true,
+    "experimentalDecorators": true,
+    "allowSyntheticDefaultImports": true,
+    "esModuleInterop": true,
+    "skipLibCheck": true,
+    "target": "es5",
+    "lib": ["es2017", "dom"]
+  }
+}
diff --git a/app/angular/src/server/__mocks-ng-workspace__/without-tsConfig/angular.json b/app/angular/src/server/__mocks-ng-workspace__/without-tsConfig/angular.json
new file mode 100644
index 00000000000..2b203f2551e
--- /dev/null
+++ b/app/angular/src/server/__mocks-ng-workspace__/without-tsConfig/angular.json
@@ -0,0 +1,16 @@
+{
+  "version": 1,
+  "projects": {
+    "foo-project": {
+      "root": "",
+      "architect": {
+        "build": {
+          "options": {
+            "assets": []
+          }
+        }
+      }
+    }
+  },
+  "defaultProject": "foo-project"
+}
diff --git a/app/angular/src/server/__mocks-ng-workspace__/without-tsConfig/src/main.ts b/app/angular/src/server/__mocks-ng-workspace__/without-tsConfig/src/main.ts
new file mode 100644
index 00000000000..63b661e3bd7
--- /dev/null
+++ b/app/angular/src/server/__mocks-ng-workspace__/without-tsConfig/src/main.ts
@@ -0,0 +1,2 @@
+// To avoid "No inputs were found in config file" tsc error
+export const not = 'empty';
diff --git a/app/angular/src/server/__mocks-ng-workspace__/without-tsConfig/src/tsconfig.app.json b/app/angular/src/server/__mocks-ng-workspace__/without-tsConfig/src/tsconfig.app.json
new file mode 100644
index 00000000000..644f410d7fb
--- /dev/null
+++ b/app/angular/src/server/__mocks-ng-workspace__/without-tsConfig/src/tsconfig.app.json
@@ -0,0 +1,9 @@
+{
+  "extends": "../tsconfig.json",
+  "compilerOptions": {
+    "baseUrl": "./",
+    "module": "es2015",
+    "types": ["node"]
+  },
+  "exclude": ["karma.ts", "**/*.spec.ts"]
+}
diff --git a/app/angular/src/server/__mocks-ng-workspace__/without-tsConfig/tsconfig.json b/app/angular/src/server/__mocks-ng-workspace__/without-tsConfig/tsconfig.json
new file mode 100644
index 00000000000..ed46a09da32
--- /dev/null
+++ b/app/angular/src/server/__mocks-ng-workspace__/without-tsConfig/tsconfig.json
@@ -0,0 +1,13 @@
+{
+  "compilerOptions": {
+    "sourceMap": true,
+    "moduleResolution": "node",
+    "emitDecoratorMetadata": true,
+    "experimentalDecorators": true,
+    "allowSyntheticDefaultImports": true,
+    "esModuleInterop": true,
+    "skipLibCheck": true,
+    "target": "es5",
+    "lib": ["es2017", "dom"]
+  }
+}
diff --git a/app/angular/src/server/angular-devkit-build-webpack.ts b/app/angular/src/server/angular-devkit-build-webpack.ts
index 9e0d540fa38..bd176b118ff 100644
--- a/app/angular/src/server/angular-devkit-build-webpack.ts
+++ b/app/angular/src/server/angular-devkit-build-webpack.ts
@@ -70,9 +70,8 @@ const buildWebpackConfigOptions = async (
 ): Promise<WebpackConfigOptions> => {
   const { options: projectBuildOptions = {} } = target;
 
-  const requiredOptions = ['tsConfig', 'assets', 'optimization'];
-
-  if (!requiredOptions.every((key) => key in projectBuildOptions)) {
+  const requiredOptions = ['tsConfig'];
+  if (!requiredOptions.every((key) => !!projectBuildOptions[key])) {
     throw new Error(
       `Missing required options in project target. Check "${requiredOptions.join(', ')}"`
     );
diff --git a/app/angular/src/server/framework-preset-angular-cli.test.ts b/app/angular/src/server/framework-preset-angular-cli.test.ts
index 6a02df73555..8d3c9a6ba37 100644
--- a/app/angular/src/server/framework-preset-angular-cli.test.ts
+++ b/app/angular/src/server/framework-preset-angular-cli.test.ts
@@ -141,7 +141,7 @@ describe('framework-preset-angular-cli', () => {
     });
     it('throws error', async () => {
       await expect(() => webpackFinal(newWebpackConfiguration(), options)).rejects.toThrowError(
-        'Missing required options in project target. Check "tsConfig, assets, optimization"'
+        'Missing required options in project target. Check "tsConfig"'
       );
       expect(logger.error).toHaveBeenCalledWith(`=> Could not get angular cli webpack config`);
     });
@@ -353,6 +353,19 @@ describe('framework-preset-angular-cli', () => {
     });
   });
 
+  describe('when angular.json haven\'t "options.tsConfig" config', () => {
+    beforeEach(() => {
+      initMockWorkspace('without-tsConfig');
+    });
+
+    it('throws error', async () => {
+      await expect(() => webpackFinal(newWebpackConfiguration(), options)).rejects.toThrowError(
+        'Missing required options in project target. Check "tsConfig"'
+      );
+      expect(logger.error).toHaveBeenCalledWith(`=> Could not get angular cli webpack config`);
+    });
+  });
+
   describe('when is a nx with angular.json', () => {
     beforeEach(() => {
       initMockWorkspace('with-nx');
@@ -509,6 +522,60 @@ describe('framework-preset-angular-cli', () => {
     });
   });
 
+  describe('when angular.json have only one lib project', () => {
+    beforeEach(() => {
+      initMockWorkspace('with-lib');
+    });
+
+    it('should extends webpack base config', async () => {
+      const baseWebpackConfig = newWebpackConfiguration();
+      const webpackFinalConfig = await webpackFinal(baseWebpackConfig, options);
+
+      expect(webpackFinalConfig).toEqual({
+        ...baseWebpackConfig,
+        entry: [...(baseWebpackConfig.entry as any[])],
+        module: { ...baseWebpackConfig.module, rules: expect.anything() },
+        plugins: expect.anything(),
+        resolve: {
+          ...baseWebpackConfig.resolve,
+          modules: expect.arrayContaining(baseWebpackConfig.resolve.modules),
+          // the base resolve.plugins are not kept 🤷‍♂️
+          plugins: expect.not.arrayContaining(baseWebpackConfig.resolve.plugins),
+        },
+        resolveLoader: expect.anything(),
+      });
+    });
+
+    it('should set webpack "module.rules"', async () => {
+      const baseWebpackConfig = newWebpackConfiguration();
+      const webpackFinalConfig = await webpackFinal(baseWebpackConfig, options);
+
+      expect(webpackFinalConfig.module.rules).toEqual([
+        {
+          exclude: [],
+          test: /\.css$/,
+          use: expect.anything(),
+        },
+        {
+          exclude: [],
+          test: /\.scss$|\.sass$/,
+          use: expect.anything(),
+        },
+        {
+          exclude: [],
+          test: /\.less$/,
+          use: expect.anything(),
+        },
+        {
+          exclude: [],
+          test: /\.styl$/,
+          use: expect.anything(),
+        },
+        ...baseWebpackConfig.module.rules,
+      ]);
+    });
+  });
+
   describe('when angular.json have some config', () => {
     beforeEach(() => {
       initMockWorkspace('some-config');
diff --git a/app/angular/src/server/framework-preset-angular-cli.ts b/app/angular/src/server/framework-preset-angular-cli.ts
index a696bbc839e..4d36a1a1f31 100644
--- a/app/angular/src/server/framework-preset-angular-cli.ts
+++ b/app/angular/src/server/framework-preset-angular-cli.ts
@@ -72,7 +72,7 @@ export async function webpackFinal(baseConfig: webpack.Configuration, options: O
   }
 
   // Use angular-cli to get some webpack config
-  let angularCliWebpackConfig;
+  let angularCliWebpackConfig: AngularCliWebpackConfig;
   try {
     angularCliWebpackConfig = await extractAngularCliWebpackConfig(dirToSearch, project, target);
     logger.info(`=> Using angular-cli webpack config`);