diff --git a/CHANGELOG.md b/CHANGELOG.md
index 4991b56..710bf0f 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,8 @@
+## 4.11.0-wip
+
+* Merge `no_leading_underscores_for_library_prefixes` from the simplePrefixing
+  allocator with other file ignores.
+
 ## 4.10.0
 
 * Add `Library.docs` to support emitting doc comments on libraries.
diff --git a/lib/src/emitter.dart b/lib/src/emitter.dart
index 12109cc..b17b6d8 100644
--- a/lib/src/emitter.dart
+++ b/lib/src/emitter.dart
@@ -489,8 +489,28 @@ class DartEmitter extends Object
         ..writeln();
     }
 
-    if (spec.ignoreForFile.isNotEmpty) {
-      final ignores = spec.ignoreForFile.toList()..sort();
+    // Process the body and annotations first in order to prime the allocators.
+    final body = StringBuffer();
+    for (final spec in spec.body) {
+      spec.accept(this, body);
+      if (spec is Method && _isLambdaMethod(spec)) {
+        body.write(';');
+      }
+    }
+    final annotations = StringBuffer();
+    for (var a in spec.annotations) {
+      visitAnnotation(a, annotations);
+    }
+
+    final directives = <Directive>[...allocator.imports, ...spec.directives];
+    final ignores = spec.ignoreForFile.toList();
+
+    if (directives.any((d) => d.as?.startsWith('_') ?? false)) {
+      ignores.add('no_leading_underscores_for_library_prefixes');
+    }
+
+    if (ignores.isNotEmpty) {
+      ignores.sort();
       final lines = ['// ignore_for_file: ${ignores.first}'];
       for (var ignore in ignores.skip(1)) {
         if (lines.last.length + 2 + ignore.length > 80) {
@@ -503,19 +523,9 @@ class DartEmitter extends Object
       output.writeln();
     }
 
-    // Process the body first in order to prime the allocators.
-    final body = StringBuffer();
-    for (final spec in spec.body) {
-      spec.accept(this, body);
-      if (spec is Method && _isLambdaMethod(spec)) {
-        body.write(';');
-      }
-    }
-
     spec.docs.forEach(output.writeln);
-    for (var a in spec.annotations) {
-      visitAnnotation(a, output);
-    }
+    output.write(annotations);
+
     if (spec.name != null) {
       output.write('library ${spec.name!};');
     } else if (spec.annotations.isNotEmpty || spec.docs.isNotEmpty) {
@@ -524,17 +534,11 @@ class DartEmitter extends Object
       output.write('library;');
     }
 
-    final directives = <Directive>[...allocator.imports, ...spec.directives];
-
     if (orderDirectives) {
       directives.sort();
     }
 
     Directive? previous;
-    if (directives.any((d) => d.as?.startsWith('_') ?? false)) {
-      output.writeln(
-          '// ignore_for_file: no_leading_underscores_for_library_prefixes');
-    }
     for (final directive in directives) {
       if (_newLineBetween(orderDirectives, previous, directive)) {
         // Note: dartfmt handles creating new lines between directives.
diff --git a/pubspec.yaml b/pubspec.yaml
index f76a6c9..a1376f3 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -1,5 +1,5 @@
 name: code_builder
-version: 4.10.0
+version: 4.11.0-wip
 description: >-
   A fluent, builder-based library for generating valid Dart code
 repository: https://github.com/dart-lang/code_builder
diff --git a/test/directive_test.dart b/test/directive_test.dart
index 0aee6ae..04b3ce7 100644
--- a/test/directive_test.dart
+++ b/test/directive_test.dart
@@ -39,6 +39,7 @@ void main() {
       library,
       equalsDart(r'''
           // ignore_for_file: no_leading_underscores_for_library_prefixes
+
           import '../relative.dart' as _i1;
           import 'package:foo/foo.dart' as _i2;
           import 'package:foo/bar.dart' as _i3;
@@ -59,6 +60,7 @@ void main() {
       library,
       equalsDart(r'''
           // ignore_for_file: no_leading_underscores_for_library_prefixes
+          
           import 'dart:collection' as _i4;
 
           import 'package:foo/bar.dart' as _i3;
diff --git a/test/specs/library_test.dart b/test/specs/library_test.dart
index 8ea4c58..a5c93cf 100644
--- a/test/specs/library_test.dart
+++ b/test/specs/library_test.dart
@@ -225,6 +225,7 @@ void main() {
             ..assignment = Code.scope((a) => '${a($LinkedHashMap)}()')))),
         equalsDart(r'''
           // ignore_for_file: no_leading_underscores_for_library_prefixes
+          
           import 'dart:collection' as _i1;
           
           final test = _i1.LinkedHashMap();
@@ -309,5 +310,28 @@ void main() {
       '''),
       );
     });
+
+    test('should emit a source file with library allocation + prefixing', () {
+      expect(
+        Library((b) => b
+          ..docs.add(
+            '/// My favorite library.',
+          )
+          ..body.add(Field((b) => b
+            ..name = 'test'
+            ..modifier = FieldModifier.final$
+            ..assignment = Code.scope((a) => '${a($LinkedHashMap)}()')))),
+        equalsDart(r'''
+          // ignore_for_file: no_leading_underscores_for_library_prefixes
+          
+          /// My favorite library.
+          library;
+          
+          import 'dart:collection' as _i1;
+          
+          final test = _i1.LinkedHashMap();
+        ''', DartEmitter(allocator: Allocator.simplePrefixing())),
+      );
+    }, skip: true);
   });
 }