diff --git a/packages/@angular/cli/utilities/read-tsconfig.ts b/packages/@angular/cli/utilities/read-tsconfig.ts
index 84baf70e71d0..0ee83f2d43e1 100644
--- a/packages/@angular/cli/utilities/read-tsconfig.ts
+++ b/packages/@angular/cli/utilities/read-tsconfig.ts
@@ -1,11 +1,10 @@
 import * as path from 'path';
-import * as ts from 'typescript';
 import { requireProjectModule } from '../utilities/require-project-module';
 
 export function readTsconfig(tsconfigPath: string) {
   const projectTs = requireProjectModule(path.dirname(tsconfigPath), 'typescript');
-  const configResult = projectTs.readConfigFile(tsconfigPath, ts.sys.readFile);
-  const tsConfig = projectTs.parseJsonConfigFileContent(configResult.config, ts.sys,
+  const configResult = projectTs.readConfigFile(tsconfigPath, projectTs.sys.readFile);
+  const tsConfig = projectTs.parseJsonConfigFileContent(configResult.config, projectTs.sys,
     path.dirname(tsconfigPath), undefined, tsconfigPath);
   return tsConfig;
 }
diff --git a/packages/@ngtools/webpack/package.json b/packages/@ngtools/webpack/package.json
index acbd41a6a1f3..b52b6b475add 100644
--- a/packages/@ngtools/webpack/package.json
+++ b/packages/@ngtools/webpack/package.json
@@ -34,7 +34,6 @@
     "source-map": "^0.5.6"
   },
   "peerDependencies": {
-    "typescript": "^2.0.2",
     "webpack": "^2.2.0 || ^3.0.0"
   }
 }
diff --git a/packages/@ngtools/webpack/src/angular_compiler_plugin.ts b/packages/@ngtools/webpack/src/angular_compiler_plugin.ts
index 40d65fbd0d3d..d909b2d82691 100644
--- a/packages/@ngtools/webpack/src/angular_compiler_plugin.ts
+++ b/packages/@ngtools/webpack/src/angular_compiler_plugin.ts
@@ -1,3 +1,4 @@
+// @ignoreDep typescript
 import * as fs from 'fs';
 import { fork, ForkOptions, ChildProcess } from 'child_process';
 import * as path from 'path';
diff --git a/packages/@ngtools/webpack/src/compiler_host.ts b/packages/@ngtools/webpack/src/compiler_host.ts
index f2ea6d4f346b..daa76e006fd9 100644
--- a/packages/@ngtools/webpack/src/compiler_host.ts
+++ b/packages/@ngtools/webpack/src/compiler_host.ts
@@ -1,3 +1,4 @@
+// @ignoreDep typescript
 import * as ts from 'typescript';
 import {basename, dirname, join, sep} from 'path';
 import * as fs from 'fs';
diff --git a/packages/@ngtools/webpack/src/entry_resolver.ts b/packages/@ngtools/webpack/src/entry_resolver.ts
index e406dc60e900..51dbf2358037 100644
--- a/packages/@ngtools/webpack/src/entry_resolver.ts
+++ b/packages/@ngtools/webpack/src/entry_resolver.ts
@@ -1,3 +1,4 @@
+// @ignoreDep typescript
 import * as fs from 'fs';
 import {join} from 'path';
 import * as ts from 'typescript';
diff --git a/packages/@ngtools/webpack/src/gather_diagnostics.ts b/packages/@ngtools/webpack/src/gather_diagnostics.ts
index 2145f045d4af..c321c3a45acc 100644
--- a/packages/@ngtools/webpack/src/gather_diagnostics.ts
+++ b/packages/@ngtools/webpack/src/gather_diagnostics.ts
@@ -1,3 +1,4 @@
+// @ignoreDep typescript
 import * as ts from 'typescript';
 
 import { time, timeEnd } from './benchmark';
diff --git a/packages/@ngtools/webpack/src/index.ts b/packages/@ngtools/webpack/src/index.ts
index 78778e1ad439..1b2f43ddb5ef 100644
--- a/packages/@ngtools/webpack/src/index.ts
+++ b/packages/@ngtools/webpack/src/index.ts
@@ -1,5 +1,20 @@
+// @ignoreDep typescript
+import { satisfies } from 'semver';
+
+// Test if typescript is available
+try {
+  const version = require('typescript').version;
+  if (!satisfies(version, '^2.0.2')) {
+    throw new Error();
+  }
+} catch (e) {
+  throw new Error('Could not find local "typescript" package.'
+    + 'The "@ngtools/webpack" package requires a local "typescript@^2.0.2" package to be installed.'
+    + e);
+}
+
 export * from './plugin';
 export * from './angular_compiler_plugin';
 export * from './extract_i18n_plugin';
-export {ngcLoader as default} from './loader';
-export {PathsPlugin} from './paths-plugin';
+export { ngcLoader as default } from './loader';
+export { PathsPlugin } from './paths-plugin';
diff --git a/packages/@ngtools/webpack/src/ngtools_api.ts b/packages/@ngtools/webpack/src/ngtools_api.ts
index d9d133c22133..4f37069ac08b 100644
--- a/packages/@ngtools/webpack/src/ngtools_api.ts
+++ b/packages/@ngtools/webpack/src/ngtools_api.ts
@@ -1,4 +1,5 @@
 // @ignoreDep @angular/compiler-cli
+// @ignoreDep typescript
 /**
  * This is a copy of types in @compiler-cli/src/ngtools_api.d.ts file,
  * together with safe imports for private apis for cases where @angular/compiler-cli isn't
diff --git a/packages/@ngtools/webpack/src/paths-plugin.ts b/packages/@ngtools/webpack/src/paths-plugin.ts
index 0c5d16da62c0..8f05721669a9 100644
--- a/packages/@ngtools/webpack/src/paths-plugin.ts
+++ b/packages/@ngtools/webpack/src/paths-plugin.ts
@@ -1,3 +1,4 @@
+// @ignoreDep typescript
 import * as path from 'path';
 import * as ts from 'typescript';
 import {
diff --git a/packages/@ngtools/webpack/src/plugin.ts b/packages/@ngtools/webpack/src/plugin.ts
index 02b1ca0f8403..8c256a366794 100644
--- a/packages/@ngtools/webpack/src/plugin.ts
+++ b/packages/@ngtools/webpack/src/plugin.ts
@@ -1,3 +1,4 @@
+// @ignoreDep typescript
 import * as fs from 'fs';
 import * as path from 'path';
 import * as ts from 'typescript';
diff --git a/packages/@ngtools/webpack/src/refactor.ts b/packages/@ngtools/webpack/src/refactor.ts
index 98e816e7e0df..71356fdbd913 100644
--- a/packages/@ngtools/webpack/src/refactor.ts
+++ b/packages/@ngtools/webpack/src/refactor.ts
@@ -1,3 +1,4 @@
+// @ignoreDep typescript
 // TODO: move this in its own package.
 import * as path from 'path';
 import * as ts from 'typescript';
diff --git a/packages/@ngtools/webpack/src/transformers/ast_helpers.ts b/packages/@ngtools/webpack/src/transformers/ast_helpers.ts
index 87a33d025604..8e59157877eb 100644
--- a/packages/@ngtools/webpack/src/transformers/ast_helpers.ts
+++ b/packages/@ngtools/webpack/src/transformers/ast_helpers.ts
@@ -1,3 +1,4 @@
+// @ignoreDep typescript
 import * as ts from 'typescript';
 import { WebpackCompilerHost } from '../compiler_host';
 import { makeTransform, TransformOperation } from './make_transform';
diff --git a/packages/@ngtools/webpack/src/transformers/export_lazy_module_map.spec.ts b/packages/@ngtools/webpack/src/transformers/export_lazy_module_map.spec.ts
index 59ad4f121cb7..1712e160dbde 100644
--- a/packages/@ngtools/webpack/src/transformers/export_lazy_module_map.spec.ts
+++ b/packages/@ngtools/webpack/src/transformers/export_lazy_module_map.spec.ts
@@ -1,3 +1,4 @@
+// @ignoreDep typescript
 import * as ts from 'typescript';
 import { oneLine, stripIndent } from 'common-tags';
 import { transformTypescript } from './ast_helpers';
diff --git a/packages/@ngtools/webpack/src/transformers/export_lazy_module_map.ts b/packages/@ngtools/webpack/src/transformers/export_lazy_module_map.ts
index 40019cbc0339..fe56fe6191a5 100644
--- a/packages/@ngtools/webpack/src/transformers/export_lazy_module_map.ts
+++ b/packages/@ngtools/webpack/src/transformers/export_lazy_module_map.ts
@@ -1,3 +1,4 @@
+// @ignoreDep typescript
 import * as path from 'path';
 import * as ts from 'typescript';
 
diff --git a/packages/@ngtools/webpack/src/transformers/export_ngfactory.spec.ts b/packages/@ngtools/webpack/src/transformers/export_ngfactory.spec.ts
index 51f7715ba099..8477143fc2dc 100644
--- a/packages/@ngtools/webpack/src/transformers/export_ngfactory.spec.ts
+++ b/packages/@ngtools/webpack/src/transformers/export_ngfactory.spec.ts
@@ -1,3 +1,4 @@
+// @ignoreDep typescript
 import * as ts from 'typescript';
 import { oneLine, stripIndent } from 'common-tags';
 import { transformTypescript } from './ast_helpers';
diff --git a/packages/@ngtools/webpack/src/transformers/export_ngfactory.ts b/packages/@ngtools/webpack/src/transformers/export_ngfactory.ts
index cb045fd58aae..4b46545d91ec 100644
--- a/packages/@ngtools/webpack/src/transformers/export_ngfactory.ts
+++ b/packages/@ngtools/webpack/src/transformers/export_ngfactory.ts
@@ -1,3 +1,4 @@
+// @ignoreDep typescript
 import * as ts from 'typescript';
 
 import { findAstNodes, getFirstNode } from './ast_helpers';
diff --git a/packages/@ngtools/webpack/src/transformers/insert_import.ts b/packages/@ngtools/webpack/src/transformers/insert_import.ts
index a8bb4966138e..c8ea9539fa5e 100644
--- a/packages/@ngtools/webpack/src/transformers/insert_import.ts
+++ b/packages/@ngtools/webpack/src/transformers/insert_import.ts
@@ -1,3 +1,4 @@
+// @ignoreDep typescript
 import * as ts from 'typescript';
 
 import { findAstNodes, getFirstNode } from './ast_helpers';
diff --git a/packages/@ngtools/webpack/src/transformers/register_locale_data.spec.ts b/packages/@ngtools/webpack/src/transformers/register_locale_data.spec.ts
index 203f11aa1fc0..f18ce7663b0c 100644
--- a/packages/@ngtools/webpack/src/transformers/register_locale_data.spec.ts
+++ b/packages/@ngtools/webpack/src/transformers/register_locale_data.spec.ts
@@ -1,3 +1,4 @@
+// @ignoreDep typescript
 import * as ts from 'typescript';
 import { oneLine, stripIndent } from 'common-tags';
 import { transformTypescript } from './ast_helpers';
diff --git a/packages/@ngtools/webpack/src/transformers/register_locale_data.ts b/packages/@ngtools/webpack/src/transformers/register_locale_data.ts
index bd2f8fd45c7c..e389d8d3409d 100644
--- a/packages/@ngtools/webpack/src/transformers/register_locale_data.ts
+++ b/packages/@ngtools/webpack/src/transformers/register_locale_data.ts
@@ -1,3 +1,4 @@
+// @ignoreDep typescript
 import * as ts from 'typescript';
 
 import { findAstNodes, getFirstNode } from './ast_helpers';
diff --git a/packages/@ngtools/webpack/src/transformers/remove_import.ts b/packages/@ngtools/webpack/src/transformers/remove_import.ts
index 58cfdbcf6705..29df47b9de3f 100644
--- a/packages/@ngtools/webpack/src/transformers/remove_import.ts
+++ b/packages/@ngtools/webpack/src/transformers/remove_import.ts
@@ -1,3 +1,4 @@
+// @ignoreDep typescript
 import * as ts from 'typescript';
 
 import { findAstNodes } from './ast_helpers';
diff --git a/packages/@ngtools/webpack/src/transformers/replace_bootstrap.spec.ts b/packages/@ngtools/webpack/src/transformers/replace_bootstrap.spec.ts
index 65c317567e10..6dd34a23cb3b 100644
--- a/packages/@ngtools/webpack/src/transformers/replace_bootstrap.spec.ts
+++ b/packages/@ngtools/webpack/src/transformers/replace_bootstrap.spec.ts
@@ -1,3 +1,4 @@
+// @ignoreDep typescript
 import * as ts from 'typescript';
 import { oneLine, stripIndent } from 'common-tags';
 import { transformTypescript } from './ast_helpers';
diff --git a/packages/@ngtools/webpack/src/transformers/replace_bootstrap.ts b/packages/@ngtools/webpack/src/transformers/replace_bootstrap.ts
index 3df2a1f0a5f0..d5fcce50fcec 100644
--- a/packages/@ngtools/webpack/src/transformers/replace_bootstrap.ts
+++ b/packages/@ngtools/webpack/src/transformers/replace_bootstrap.ts
@@ -1,3 +1,4 @@
+// @ignoreDep typescript
 import * as ts from 'typescript';
 
 import { findAstNodes } from './ast_helpers';
diff --git a/packages/@ngtools/webpack/src/transformers/replace_resources.spec.ts b/packages/@ngtools/webpack/src/transformers/replace_resources.spec.ts
index 5b6b4dbd5b2c..f687f4abbd1b 100644
--- a/packages/@ngtools/webpack/src/transformers/replace_resources.spec.ts
+++ b/packages/@ngtools/webpack/src/transformers/replace_resources.spec.ts
@@ -1,3 +1,4 @@
+// @ignoreDep typescript
 import * as ts from 'typescript';
 import { oneLine, stripIndent } from 'common-tags';
 import { transformTypescript } from './ast_helpers';
diff --git a/packages/@ngtools/webpack/src/transformers/replace_resources.ts b/packages/@ngtools/webpack/src/transformers/replace_resources.ts
index 51091f2f0d18..460c749d904e 100644
--- a/packages/@ngtools/webpack/src/transformers/replace_resources.ts
+++ b/packages/@ngtools/webpack/src/transformers/replace_resources.ts
@@ -1,3 +1,4 @@
+// @ignoreDep typescript
 import * as ts from 'typescript';
 
 import { findAstNodes, getFirstNode } from './ast_helpers';
diff --git a/packages/@ngtools/webpack/src/type_checker.ts b/packages/@ngtools/webpack/src/type_checker.ts
index 30014cd0f48e..18c1629a3ee0 100644
--- a/packages/@ngtools/webpack/src/type_checker.ts
+++ b/packages/@ngtools/webpack/src/type_checker.ts
@@ -1,3 +1,4 @@
+// @ignoreDep typescript
 import * as process from 'process';
 import * as ts from 'typescript';
 import chalk from 'chalk';
diff --git a/tests/e2e/tests/misc/version.ts b/tests/e2e/tests/misc/version.ts
index c49c0c62dae3..7b12da7f7da0 100644
--- a/tests/e2e/tests/misc/version.ts
+++ b/tests/e2e/tests/misc/version.ts
@@ -6,5 +6,8 @@ export default function() {
   return ng('version')
     .then(() => deleteFile('.angular-cli.json'))
     // doesn't fail on a project with missing .angular-cli.json
+    .then(() => ng('version'))
+    // Doesn't fail outside a project.
+    .then(() => process.chdir('/'))
     .then(() => ng('version'));
 }