diff --git a/build.gradle b/build.gradle
index fc362ed..0df6822 100644
--- a/build.gradle
+++ b/build.gradle
@@ -15,7 +15,7 @@ apply from: 'https://github.com/FabricMC/fabric-docs/raw/master/gradle/license.g
 
 group = 'net.fabricmc'
 archivesBaseName = project.name.toLowerCase()
-version = '0.0.3-SNAPSHOT'
+version = '0.0.4-SNAPSHOT'
 
 repositories {
     mavenCentral()
diff --git a/src/main/java/net/fabricmc/loom/AbstractPlugin.java b/src/main/java/net/fabricmc/loom/AbstractPlugin.java
index f089b9d..9fbcfc8 100644
--- a/src/main/java/net/fabricmc/loom/AbstractPlugin.java
+++ b/src/main/java/net/fabricmc/loom/AbstractPlugin.java
@@ -31,6 +31,7 @@ import com.google.gson.JsonObject;
 import net.fabricmc.loom.task.DownloadTask;
 import net.fabricmc.loom.util.Constants;
 import net.fabricmc.loom.util.Version;
+import org.gradle.api.Action;
 import org.gradle.api.Plugin;
 import org.gradle.api.Project;
 import org.gradle.api.Task;
@@ -38,6 +39,7 @@ import org.gradle.api.artifacts.repositories.MavenArtifactRepository;
 import org.gradle.api.plugins.JavaPlugin;
 import org.gradle.api.plugins.JavaPluginConvention;
 import org.gradle.api.tasks.SourceSet;
+import org.gradle.api.tasks.compile.JavaCompile;
 import org.gradle.api.tasks.javadoc.Javadoc;
 import org.gradle.plugins.ide.eclipse.model.EclipseModel;
 import org.gradle.plugins.ide.idea.model.IdeaModel;
@@ -46,6 +48,8 @@ import java.io.File;
 import java.io.FileNotFoundException;
 import java.io.FileReader;
 import java.io.IOException;
+import java.util.Map;
+import java.util.Set;
 
 public class AbstractPlugin implements Plugin<Project> {
 	protected Project project;
@@ -62,7 +66,8 @@ public class AbstractPlugin implements Plugin<Project> {
 		project.getExtensions().create("minecraft", LoomGradleExtension.class);
 		project.getExtensions().getByType(LoomGradleExtension.class).project = project;
 
-		readModJson(project.getExtensions().getByType(LoomGradleExtension.class));
+		LoomGradleExtension extension = project.getExtensions().getByType(LoomGradleExtension.class);
+		readModJson(extension);
 
 		// Force add Mojang repository
 		addMavenRepo(target, "Mojang", "https://libraries.minecraft.net/");
@@ -77,6 +82,29 @@ public class AbstractPlugin implements Plugin<Project> {
 
 		configureIDEs();
 		configureCompile();
+
+		//TODO other languages?
+		Map<Project,Set<Task>> taskMap = project.getAllTasks(true);
+		for(Map.Entry<Project,Set<Task>> entry : taskMap.entrySet()) {
+			Project project = entry.getKey();
+			Set<Task> taskSet = entry.getValue();
+			for(Task task : taskSet){
+				if(task instanceof JavaCompile){
+					JavaCompile javaCompileTask = (JavaCompile) task;
+					javaCompileTask.doFirst(task1 -> {
+						project.getLogger().lifecycle(":setting java compiler args");
+						try {
+							javaCompileTask.getOptions().getCompilerArgs().add("-AreobfNotchSrgFile=" + Constants.MAPPINGS_SRG.get(extension).getCanonicalPath());
+							javaCompileTask.getOptions().getCompilerArgs().add("-AdefaultObfuscationEnv=notch");
+						} catch (IOException e) {
+							e.printStackTrace();
+						}
+					});
+				}
+			}
+
+		}
+
 	}
 
 	/**
diff --git a/src/main/java/net/fabricmc/loom/util/Constants.java b/src/main/java/net/fabricmc/loom/util/Constants.java
index c741e98..5621791 100644
--- a/src/main/java/net/fabricmc/loom/util/Constants.java
+++ b/src/main/java/net/fabricmc/loom/util/Constants.java
@@ -46,6 +46,9 @@ public class Constants {
 	public static final IDelayed<File> POMF_DIR = new DelayedFile(extension -> new File(extension.getFabricUserCache(), "pomf"));
 	public static final IDelayed<File> MAPPINGS_ZIP = new DelayedFile(extension -> new File(POMF_DIR.get(extension), "pomf-enigma-" + extension.version + "." + extension.pomfVersion + ".zip"));
 	public static final IDelayed<File> MAPPINGS_DIR = new DelayedFile(extension -> new File(POMF_DIR.get(extension), "pomf-enigma-" + extension.version + "." + extension.pomfVersion + ""));
+	public static final IDelayed<File> MAPPINGS_SRG = new DelayedFile(extension -> new File(WORKING_DIRECTORY, "mappings.srg"));
+
+	public static final IDelayed<File> REF_MAP = new DelayedFile(extension -> new File(WORKING_DIRECTORY, "RefMap.json"));
 
 	public static final IDelayed<File> MINECRAFT_LIBS = new DelayedFile(extension -> new File(extension.getFabricUserCache(), extension.version + "-libs"));
 	public static final IDelayed<File> MINECRAFT_NATIVES = new DelayedFile(extension -> new File(extension.getFabricUserCache(), extension.version + "-natives"));