diff --git a/packages/compiler-cli/ngcc/src/dependencies/esm_dependency_host.ts b/packages/compiler-cli/ngcc/src/dependencies/esm_dependency_host.ts
index 5ce08b8493..68890f25c4 100644
--- a/packages/compiler-cli/ngcc/src/dependencies/esm_dependency_host.ts
+++ b/packages/compiler-cli/ngcc/src/dependencies/esm_dependency_host.ts
@@ -263,7 +263,7 @@ export class EsmDependencyHost extends DependencyHostBase {
  * in this file, true otherwise.
  */
 export function hasImportOrReexportStatements(source: string): boolean {
-  return /(?:import|export)[\s\S]+?(["'])(?:(?:\\\1|.)*?)\1/.test(source);
+  return /(?:import|export)[\s\S]+?(["'])(?:\\\1|.)+?\1/.test(source);
 }
 
 
@@ -299,4 +299,4 @@ function canPrecedeARegex(kind: ts.SyntaxKind): boolean {
     default:
       return true;
   }
-}
\ No newline at end of file
+}
diff --git a/packages/compiler-cli/ngcc/src/entry_point_finder/targeted_entry_point_finder.ts b/packages/compiler-cli/ngcc/src/entry_point_finder/targeted_entry_point_finder.ts
index 4bf2f113d3..834ee6a17f 100644
--- a/packages/compiler-cli/ngcc/src/entry_point_finder/targeted_entry_point_finder.ts
+++ b/packages/compiler-cli/ngcc/src/entry_point_finder/targeted_entry_point_finder.ts
@@ -5,18 +5,15 @@
  * Use of this source code is governed by an MIT-style license that can be
  * found in the LICENSE file at https://angular.io/license
  */
-import {AbsoluteFsPath, FileSystem, join, PathSegment, relative, relativeFrom} from '../../../src/ngtsc/file_system';
-import {EntryPointWithDependencies} from '../dependencies/dependency_host';
+import {AbsoluteFsPath, FileSystem} from '../../../src/ngtsc/file_system';
 import {DependencyResolver, SortedEntryPointsInfo} from '../dependencies/dependency_resolver';
 import {Logger} from '../logging/logger';
 import {hasBeenProcessed} from '../packages/build_marker';
 import {NgccConfiguration} from '../packages/configuration';
-import {EntryPoint, EntryPointJsonProperty, getEntryPointInfo, INCOMPATIBLE_ENTRY_POINT, NO_ENTRY_POINT} from '../packages/entry_point';
+import {EntryPointJsonProperty} from '../packages/entry_point';
 import {PathMappings} from '../path_mappings';
 
-import {EntryPointFinder} from './interface';
 import {TracingEntryPointFinder} from './tracing_entry_point_finder';
-import {getBasePaths} from './utils';
 
 /**
  * An EntryPointFinder that starts from a target entry-point and only finds