diff --git a/src/main/java/net/fabricmc/loom/configuration/accesstransformer/AccessTransformerJarProcessor.java b/src/main/java/net/fabricmc/loom/configuration/accesstransformer/AccessTransformerJarProcessor.java
index 0c9e5efc..45867942 100644
--- a/src/main/java/net/fabricmc/loom/configuration/accesstransformer/AccessTransformerJarProcessor.java
+++ b/src/main/java/net/fabricmc/loom/configuration/accesstransformer/AccessTransformerJarProcessor.java
@@ -37,6 +37,8 @@ import java.util.Set;
 import com.google.common.hash.Hashing;
 import com.google.common.io.ByteSource;
 import org.apache.commons.io.output.NullOutputStream;
+import org.cadixdev.at.AccessTransformSet;
+import org.cadixdev.at.io.AccessTransformFormats;
 import org.gradle.api.Project;
 import org.gradle.api.file.ConfigurableFileCollection;
 import org.gradle.api.file.FileCollection;
@@ -46,10 +48,13 @@ import org.gradle.api.plugins.JavaPluginExtension;
 import org.gradle.api.tasks.SourceSet;
 
 import net.fabricmc.loom.LoomGradleExtension;
+import net.fabricmc.loom.api.mappings.layered.MappingsNamespace;
 import net.fabricmc.loom.configuration.processors.JarProcessor;
 import net.fabricmc.loom.util.Checksum;
 import net.fabricmc.loom.util.Constants;
 import net.fabricmc.loom.util.DependencyDownloader;
+import net.fabricmc.lorenztiny.TinyMappingsReader;
+import net.fabricmc.mappingio.tree.MemoryMappingTree;
 
 public final class AccessTransformerJarProcessor implements JarProcessor {
 	private final Project project;
@@ -112,17 +117,18 @@ public final class AccessTransformerJarProcessor implements JarProcessor {
 	@Override
 	public void process(File file) {
 		try {
+			project.getLogger().lifecycle(":applying project access transformers");
 			Path tempDir = Files.createTempDirectory("loom-access-transforming");
 			Path tempInput = tempDir.resolve("input.jar");
 			Files.copy(file.toPath(), tempInput);
+			Path atPath = mergeAndRemapAccessTransformers(tempDir);
 
 			executeAt(project, tempInput, file.toPath(), args -> {
-				for (File atFile : atFiles) {
-					args.add("--atFile");
-					args.add(atFile.getAbsolutePath());
-				}
+				args.add("--atFile");
+				args.add(atPath.toAbsolutePath().toString());
 			});
 
+			Files.delete(atPath);
 			Files.delete(tempInput);
 			Files.delete(tempDir);
 		} catch (IOException e) {
@@ -130,6 +136,35 @@ public final class AccessTransformerJarProcessor implements JarProcessor {
 		}
 	}
 
+	private Path mergeAndRemapAccessTransformers(Path tempDir) {
+		AccessTransformSet accessTransformSet = AccessTransformSet.create();
+
+		for (File atFile : atFiles) {
+			try {
+				accessTransformSet.merge(AccessTransformFormats.FML.read(atFile.toPath()));
+			} catch (IOException e) {
+				throw new UncheckedIOException("Could not read access transformer " + atFile, e);
+			}
+		}
+
+		try {
+			MemoryMappingTree mappings = LoomGradleExtension.get(project).getMappingsProvider().getMappingsWithSrg();
+			accessTransformSet = accessTransformSet.remap(new TinyMappingsReader(mappings, MappingsNamespace.SRG.toString(), MappingsNamespace.NAMED.toString()).read());
+		} catch (IOException e) {
+			throw new UncheckedIOException("Could not remap access transformers from srg to named", e);
+		}
+
+		Path accessTransformerPath = tempDir.resolve("accesstransformer.cfg");
+
+		try {
+			AccessTransformFormats.FML.write(accessTransformerPath, accessTransformSet);
+		} catch (IOException e) {
+			throw new UncheckedIOException("Could not write access transformers to " + accessTransformerPath, e);
+		}
+
+		return accessTransformerPath;
+	}
+
 	public static void executeAt(Project project, Path input, Path output, AccessTransformerConfiguration configuration) throws IOException {
 		boolean serverBundleMetadataPresent = LoomGradleExtension.get(project).getMinecraftProvider().getServerBundleMetadata() != null;
 		String atDependency = Constants.Dependencies.ACCESS_TRANSFORMERS + (serverBundleMetadataPresent ? Constants.Dependencies.Versions.ACCESS_TRANSFORMERS_NEW : Constants.Dependencies.Versions.ACCESS_TRANSFORMERS);
diff --git a/src/main/java/net/fabricmc/loom/configuration/providers/forge/MinecraftPatchedProvider.java b/src/main/java/net/fabricmc/loom/configuration/providers/forge/MinecraftPatchedProvider.java
index 670fbe05..7f242989 100644
--- a/src/main/java/net/fabricmc/loom/configuration/providers/forge/MinecraftPatchedProvider.java
+++ b/src/main/java/net/fabricmc/loom/configuration/providers/forge/MinecraftPatchedProvider.java
@@ -110,6 +110,7 @@ public class MinecraftPatchedProvider extends MergedMinecraftProvider {
 	private File minecraftClientExtra;
 
 	private boolean dirty;
+	private boolean serverJarInitialized = false;
 
 	public static MergedMinecraftProvider createMergedMinecraftProvider(Project project) {
 		return LoomGradleExtension.get(project).isForge() ? new MinecraftPatchedProvider(project) : new MergedMinecraftProvider(project);
@@ -146,8 +147,13 @@ public class MinecraftPatchedProvider extends MergedMinecraftProvider {
 		minecraftClientExtra = file("forge-client-extra.jar");
 	}
 
-	private File getEffectiveServerJar() {
+	private File getEffectiveServerJar() throws IOException {
 		if (getServerBundleMetadata() != null) {
+			if (!serverJarInitialized) {
+				extractBundledServerJar();
+				serverJarInitialized = true;
+			}
+
 			return getMinecraftExtractedServerJar();
 		} else {
 			return getMinecraftServerJar();
diff --git a/src/main/java/net/fabricmc/loom/configuration/providers/minecraft/mapped/ProcessedNamedMinecraftProvider.java b/src/main/java/net/fabricmc/loom/configuration/providers/minecraft/mapped/ProcessedNamedMinecraftProvider.java
index 658894c1..b0009bcb 100644
--- a/src/main/java/net/fabricmc/loom/configuration/providers/minecraft/mapped/ProcessedNamedMinecraftProvider.java
+++ b/src/main/java/net/fabricmc/loom/configuration/providers/minecraft/mapped/ProcessedNamedMinecraftProvider.java
@@ -100,7 +100,7 @@ public abstract class ProcessedNamedMinecraftProvider<M extends MinecraftProvide
 
 	@Override
 	protected String getName(String name) {
-		return "%s%s-%s".formatted(projectMappedName, name, getTargetNamespace().toString());
+		return "%s%s%s-%s".formatted(parentMinecraftProvider.getMinecraftProvider().getJarPrefix(), projectMappedName, name, getTargetNamespace().toString());
 	}
 
 	@Override
diff --git a/src/test/groovy/net/fabricmc/loom/test/integration/forge/AccessTransformerTest.groovy b/src/test/groovy/net/fabricmc/loom/test/integration/forge/AccessTransformerTest.groovy
new file mode 100644
index 00000000..b47d6ec5
--- /dev/null
+++ b/src/test/groovy/net/fabricmc/loom/test/integration/forge/AccessTransformerTest.groovy
@@ -0,0 +1,44 @@
+/*
+ * This file is part of fabric-loom, licensed under the MIT License (MIT).
+ *
+ * Copyright (c) 2022 FabricMC
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+package net.fabricmc.loom.test.integration.forge
+
+import net.fabricmc.loom.test.util.GradleProjectTestTrait
+import spock.lang.Specification
+
+import static net.fabricmc.loom.test.LoomTestConstants.DEFAULT_GRADLE
+import static org.gradle.testkit.runner.TaskOutcome.SUCCESS
+
+class AccessTransformerTest extends Specification implements GradleProjectTestTrait {
+    def "build"() {
+		setup:
+			def gradle = gradleProject(project: "forge/accessTransformer", version: DEFAULT_GRADLE)
+
+		when:
+			def result = gradle.run(task: "build")
+
+		then:
+			result.task(":build").outcome == SUCCESS
+    }
+}
diff --git a/src/test/resources/projects/forge/accessTransformer/build.gradle b/src/test/resources/projects/forge/accessTransformer/build.gradle
new file mode 100644
index 00000000..4b8ee2de
--- /dev/null
+++ b/src/test/resources/projects/forge/accessTransformer/build.gradle
@@ -0,0 +1,73 @@
+plugins {
+	id 'dev.architectury.loom'
+	id 'maven-publish'
+}
+
+sourceCompatibility = JavaVersion.VERSION_17
+targetCompatibility = JavaVersion.VERSION_17
+
+archivesBaseName = project.archives_base_name
+version = project.mod_version
+group = project.maven_group
+
+repositories {
+	// Add repositories to retrieve artifacts from in here.
+	// You should only use this when depending on other mods because
+	// Loom adds the essential maven repositories to download Minecraft and libraries from automatically.
+	// See https://docs.gradle.org/current/userguide/declaring_repositories.html
+	// for more information about repositories.
+}
+
+dependencies {
+	// To change the versions see the gradle.properties file
+	minecraft "com.mojang:minecraft:1.18.1"
+	mappings "net.fabricmc:yarn:1.18.1+build.22:v2"
+	forge "net.minecraftforge:forge:1.18.1-39.0.45"
+}
+
+tasks.withType(JavaCompile).configureEach {
+	// ensure that the encoding is set to UTF-8, no matter what the system default is
+	// this fixes some edge cases with special characters not displaying correctly
+	// see http://yodaconditions.net/blog/fix-for-java-file-encoding-problems-with-gradle.html
+	// If Javadoc is generated, this must be specified in that task too.
+	it.options.encoding = "UTF-8"
+
+	// Minecraft 1.18 (1.18-pre2) upwards uses Java 17.
+	it.options.release = 17
+}
+
+java {
+	// Loom will automatically attach sourcesJar to a RemapSourcesJar task and to the "build" task
+	// if it is present.
+	// If you remove this line, sources will not be generated.
+	withSourcesJar()
+}
+
+jar {
+	from("LICENSE") {
+		rename { "${it}_${project.archivesBaseName}"}
+	}
+}
+
+// configure the maven publication
+publishing {
+	publications {
+		mavenJava(MavenPublication) {
+			// add all the jars that should be included when publishing to maven
+			artifact(remapJar) {
+				builtBy remapJar
+			}
+			artifact(sourcesJar) {
+				builtBy remapSourcesJar
+			}
+		}
+	}
+
+	// See https://docs.gradle.org/current/userguide/publishing_maven.html for information on how to set up publishing.
+	repositories {
+		// Add repositories to publish to here.
+		// Notice: This block does NOT have the same function as the block in the top level.
+		// The repositories here will be used for publishing your artifact, not for
+		// retrieving dependencies.
+	}
+}
diff --git a/src/test/resources/projects/forge/accessTransformer/gradle.properties b/src/test/resources/projects/forge/accessTransformer/gradle.properties
new file mode 100644
index 00000000..5ea41e63
--- /dev/null
+++ b/src/test/resources/projects/forge/accessTransformer/gradle.properties
@@ -0,0 +1,16 @@
+# Done to increase the memory available to gradle.
+org.gradle.jvmargs=-Xmx1G
+
+# Fabric Properties
+# check these on https://fabricmc.net/use
+loader_version=0.11.2
+
+# Mod Properties
+mod_version = 1.0.0
+maven_group = com.example
+archives_base_name = fabric-example-mod
+
+# Dependencies
+# currently not on the main fabric site, check on the maven: https://maven.fabricmc.net/net/fabricmc/fabric-api/fabric-api
+
+loom.platform=forge
diff --git a/src/test/resources/projects/forge/accessTransformer/settings.gradle b/src/test/resources/projects/forge/accessTransformer/settings.gradle
new file mode 100644
index 00000000..c162c363
--- /dev/null
+++ b/src/test/resources/projects/forge/accessTransformer/settings.gradle
@@ -0,0 +1,2 @@
+rootProject.name = "fabric-example-mod"
+
diff --git a/src/test/resources/projects/forge/accessTransformer/src/main/java/com/example/examplemod/ExampleMod.java b/src/test/resources/projects/forge/accessTransformer/src/main/java/com/example/examplemod/ExampleMod.java
new file mode 100644
index 00000000..07fee23f
--- /dev/null
+++ b/src/test/resources/projects/forge/accessTransformer/src/main/java/com/example/examplemod/ExampleMod.java
@@ -0,0 +1,24 @@
+package com.example.examplemod;
+
+import net.minecraftforge.eventbus.api.IEventBus;
+import net.minecraftforge.fml.common.Mod;
+import net.minecraftforge.fml.javafmlmod.FMLJavaModLoadingContext;
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
+
+@Mod("examplemod")
+public class ExampleMod {
+
+    public static final Logger LOGGER = LogManager.getLogger();
+
+    public ExampleMod() {
+
+        // This is our mod's event bus, used for things like registry or lifecycle events
+        IEventBus MOD_BUS = FMLJavaModLoadingContext.get().getModEventBus();
+
+        // For more information on how to deal with events in Forge,
+        // like automatically subscribing an entire class to an event bus
+        // or using static methods to listen to events,
+        // feel free to check out the Forge wiki!
+    }
+}
diff --git a/src/test/resources/projects/forge/accessTransformer/src/main/java/com/example/examplemod/TestBlock.java b/src/test/resources/projects/forge/accessTransformer/src/main/java/com/example/examplemod/TestBlock.java
new file mode 100644
index 00000000..ebb5018a
--- /dev/null
+++ b/src/test/resources/projects/forge/accessTransformer/src/main/java/com/example/examplemod/TestBlock.java
@@ -0,0 +1,17 @@
+package com.example.examplemod;
+
+import net.minecraft.block.AbstractBlock;
+import net.minecraft.block.BlockState;
+import net.minecraft.block.PaneBlock;
+
+class TestBlock extends PaneBlock {
+	public TestBlock(AbstractBlock.Settings settings) {
+		super(settings);
+	}
+
+	// Test that our access transformer works
+	@Override
+	public boolean connectsTo(BlockState state, boolean sideSolidFullSquare) {
+		return false;
+	}
+}
diff --git a/src/test/resources/projects/forge/accessTransformer/src/main/resources/META-INF/accesstransformer.cfg b/src/test/resources/projects/forge/accessTransformer/src/main/resources/META-INF/accesstransformer.cfg
new file mode 100644
index 00000000..5aed88c9
--- /dev/null
+++ b/src/test/resources/projects/forge/accessTransformer/src/main/resources/META-INF/accesstransformer.cfg
@@ -0,0 +1 @@
+public-f net.minecraft.world.level.block.IronBarsBlock m_54217_(Lnet/minecraft/world/level/block/state/BlockState;Z)Z
diff --git a/src/test/resources/projects/forge/accessTransformer/src/main/resources/META-INF/mods.toml b/src/test/resources/projects/forge/accessTransformer/src/main/resources/META-INF/mods.toml
new file mode 100644
index 00000000..ca9ac0cd
--- /dev/null
+++ b/src/test/resources/projects/forge/accessTransformer/src/main/resources/META-INF/mods.toml
@@ -0,0 +1,58 @@
+# This is an example mods.toml file.
+# Any fields that aren't annotated with #optional are *required*!
+modLoader = "javafml"
+loaderVersion = "[38,)"
+license = "All rights reserved" # Want to make your mod open source? Check out https://choosealicense.com/!
+
+# This is a URL to e.g. your GitHub or CurseForge issues page.
+# It will appear in any crash reports this mod is directly involved in.
+# issueTrackerURL="https://github.com/invalid/pleasechangeme/issues" #optional
+# A list of mods - how many allowed here is determined by the individual mod loader
+
+[[mods]]
+modId = "examplemod"
+# The version number of the mod - unlike in the Forge MDK,
+# we'll use the processResources task to replace this for us
+version = "${version}"
+displayName = "Example Mod"
+# This URL will be queried by the Forge update checker in order to find the latest version of your mod.
+# If an update is found, you'll see a little blinking "emerald" symbol on your Mods button!
+# updateJSONURL="https://changeme.dev/updates.json" #optional
+# This is your mod's "homepage" and will be displayed on the mod's information screen in the Mods panel.
+# displayURL="https://changeme.dev/" #optional
+# This will be displayed as your mod's logo in the Mods panel.
+# logoFile="icon.png" #optional
+# Some more fluff displayed in the Mods panel. Feel free to issue your special thanks here!
+# credits="Thanks to Mojang for making this great game" #optional
+# Some more fluff displayed in the Mods panel. Plug your stuff here!
+# authors="Me!" #optional
+# A multi-line description for your mod. This has no minimum length, but it *is* required!
+description = '''
+This is a very cool mod that does... things.
+
+...and stuff.
+
+Have I reached 280 characters yet?
+'''
+
+# An (optional) dependency for your mod. Though technically not required,
+# it's always helpful to add these to stop your mod from loading when something is missing
+# rather than erroring out later
+[[dependencies.examplemod]]
+modId = "forge"
+mandatory = true # do you **need** this mod to be able to launch?
+# A version range using interval notation.
+# Brackets mean "inclusive" bounds, while parentheses mean "exclusive".
+versionRange = "[38,)" # This essentially means any forge >= 38
+ordering = "NONE" # Use this if you want your mod to be loaded specifically BEFORE or AFTER another mod
+side = "BOTH" # Specify where this mod is required: can be BOTH, CLIENT or SERVER
+
+# And another dependency, use this if you want to require a certain Minecraft version.
+[[dependencies.examplemod]]
+modId = "minecraft"
+mandatory = true
+# See above for how to read this notation, this essentially means any
+# version of Minecraft from 1.18 (inclusive).
+versionRange = "[1.18,)"
+ordering = "NONE"
+side = "BOTH"
diff --git a/src/test/resources/projects/forge/accessTransformer/src/main/resources/pack.mcmeta b/src/test/resources/projects/forge/accessTransformer/src/main/resources/pack.mcmeta
new file mode 100644
index 00000000..e685bfcd
--- /dev/null
+++ b/src/test/resources/projects/forge/accessTransformer/src/main/resources/pack.mcmeta
@@ -0,0 +1,7 @@
+{
+  "pack": {
+    "description": "Resources for examplemod",
+    "pack_format": 8,
+    "_comment": "pack_format 8 is the current format for Minecraft 1.18. Be aware may have changed by the time you use this template!"
+  }
+}