mixinConfigs and convertAccessWideners not applied when using loom-no-remap

src/main/java/net/fabricmc/loom/task/NonRemappedJarTaskConfiguration.java

@@ -44,6 +44,7 @@
 import net.fabricmc.loom.task.service.ClientEntriesService;
 import net.fabricmc.loom.task.service.JarManifestService;
 import net.fabricmc.loom.util.Constants;
+import net.fabricmc.loom.util.gradle.GradleUtils;
 import net.fabricmc.loom.util.gradle.SourceSetHelper;
 import net.fabricmc.loom.util.service.ScopedServiceFactory;
 
@@ -83,15 +84,17 @@ public void configure() {
 
 		extension.getUnmappedModCollection().from(project.getTasks().named(JavaPlugin.JAR_TASK_NAME));
 
-		if (extension.isForge()) {
-			if (PropertyUtil.getAndFinalize(extension.getForge().getConvertAccessWideners())) {
-				extension.getForge().convertAccessWideners(project.getTasks().named(JavaPlugin.JAR_TASK_NAME, Jar.class), settings -> {
-					settings.getAccessWideners().addAll(Aw2At.getForgeAtAccessWideners(project));
-				});
-			}
+		GradleUtils.afterSuccessfulEvaluation(project, () -> {
+			if (extension.isForge()) {
+				if (PropertyUtil.getAndFinalize(extension.getForge().getConvertAccessWideners())) {
+					extension.getForge().convertAccessWideners(project.getTasks().named(JavaPlugin.JAR_TASK_NAME, Jar.class), settings -> {
+						settings.getAccessWideners().addAll(Aw2At.getForgeAtAccessWideners(project));
+					});
+				}
 
-			ModBuildExtensions.addMixinConfigsToDefaultJarManifest(project);
-		}
+				ModBuildExtensions.addMixinConfigsToDefaultJarManifest(project);
+			}
+		});
 	}
 
 	private List<String> getClientOnlyEntries() {

src/test/groovy/net/fabricmc/loom/test/integration/forge/Forge261Test.groovy

@@ -24,10 +24,14 @@
 
 package net.fabricmc.loom.test.integration.forge
 
+import java.util.jar.Manifest
+
 import spock.lang.Specification
 import spock.lang.Unroll
 
 import net.fabricmc.loom.test.util.GradleProjectTestTrait
+import net.fabricmc.loom.util.Constants
+import net.fabricmc.loom.util.ZipUtils
 
 import static net.fabricmc.loom.test.LoomTestConstants.DEFAULT_GRADLE
 import static org.gradle.testkit.runner.TaskOutcome.SUCCESS
@@ -51,6 +55,10 @@ class Forge261Test extends Specification implements GradleProjectTestTrait {
 		then:
 		result.task(":build").outcome == SUCCESS
 
+		def main = gradle.getOutputFile("fabric-example-mod-1.0.0.jar").toPath()
+		def manifest = new Manifest(new ByteArrayInputStream(ZipUtils.unpack(main, "META-INF/MANIFEST.MF")))
+		manifest.getMainAttributes().getValue(Constants.Forge.MIXIN_CONFIGS_MANIFEST_KEY) == "test.mixins.json"
+
 		where:
 		mcVersion | forgeVersion
 		'26.1'    | '62.0.9'

src/test/resources/projects/forge/261/build.gradle

@@ -18,6 +18,12 @@ group = project.maven_group
 def mcVersion = "@MCVERSION@"
 def forgeVersion = "@FORGEVERSION@"
 
+loom {
+	forge {
+		mixinConfigs "test.mixins.json"
+	}
+}
+
 dependencies {
 	minecraft "com.mojang:minecraft:$mcVersion"
 	forge "net.minecraftforge:forge:$mcVersion-$forgeVersion"

src/test/resources/projects/forge/261/src/main/resources/test.mixins.json

@@ -0,0 +1,11 @@
+{
+  "required": true,
+  "minVersion": "0.8",
+  "package": "com.example.mixin",
+  "compatibilityLevel": "JAVA_21",
+  "mixins": [
+  ],
+  "injectors": {
+    "defaultRequire": 1
+  }
+}