diff --git a/packages/compiler-cli/ngcc/src/locking/sync_locker.ts b/packages/compiler-cli/ngcc/src/locking/sync_locker.ts
index 58f0762416..54cca4d4a5 100644
--- a/packages/compiler-cli/ngcc/src/locking/sync_locker.ts
+++ b/packages/compiler-cli/ngcc/src/locking/sync_locker.ts
@@ -54,8 +54,7 @@ export class SyncLocker {
     const pid = this.lockFile.read();
     throw new Error(
         `ngcc is already running at process with id ${pid}.\n` +
-        `If you are running multiple builds in parallel then you should pre-process your node_modules via the command line ngcc tool before starting the builds;\n` +
-        `See https://v9.angular.io/guide/ivy#speeding-up-ngcc-compilation.\n` +
+        `If you are running multiple builds in parallel then you might try pre-processing your node_modules via the command line ngcc tool before starting the builds.\n` +
         `(If you are sure no ngcc process is running then you should delete the lock-file at ${
             this.lockFile.path}.)`);
   }
diff --git a/packages/compiler-cli/ngcc/test/locking/sync_locker_spec.ts b/packages/compiler-cli/ngcc/test/locking/sync_locker_spec.ts
index 21fc15790a..b1445c4085 100644
--- a/packages/compiler-cli/ngcc/test/locking/sync_locker_spec.ts
+++ b/packages/compiler-cli/ngcc/test/locking/sync_locker_spec.ts
@@ -58,8 +58,7 @@ runInEachFileSystem(() => {
         expect(() => locker.lock(() => {}))
             .toThrowError(
                 `ngcc is already running at process with id 188.\n` +
-                `If you are running multiple builds in parallel then you should pre-process your node_modules via the command line ngcc tool before starting the builds;\n` +
-                `See https://v9.angular.io/guide/ivy#speeding-up-ngcc-compilation.\n` +
+                `If you are running multiple builds in parallel then you might try pre-processing your node_modules via the command line ngcc tool before starting the builds.\n` +
                 `(If you are sure no ngcc process is running then you should delete the lock-file at ${
                     lockFile.path}.)`);
       });