diff --git a/build.gradle b/build.gradle
index 0f06dd7..a7dbf4b 100644
--- a/build.gradle
+++ b/build.gradle
@@ -1,4 +1,4 @@
-//version: 1656003793falsepattern29
+//version: 1656003793falsepattern31
 /*
 DO NOT CHANGE THIS FILE!
 
@@ -24,7 +24,7 @@ buildscript {
         mavenLocal()
         maven {
             name = "forge"
-            url = "https://maven.minecraftforge.net"
+            url = "https://mvn.falsepattern.com/forge/"
         }
         maven {
             name = "sonatype"
@@ -36,11 +36,11 @@ buildscript {
         }
         maven {
             name = "jitpack"
-            url = "https://jitpack.falsepattern.com/"
+            url = "https://mvn.falsepattern.com/jitpack/"
         }
         maven {
-            name = "mavenpattern"
-            url = "https://maven.falsepattern.com/"
+            name = "mvnpattern"
+            url = "https://mvn.falsepattern.com/releases/"
         }
     }
     dependencies {
@@ -120,11 +120,18 @@ propertyDefaultIfUnset("mavenArtifactId", "")
 propertyDefaultIfUnset("hasMixinDeps", false)
 propertyDefaultIfUnset("mixinPreinitConfig", "")
 propertyDefaultIfUnset("remapStubs", false)
+propertyDefaultIfUnset("useObsoleteSpongeMixins", false)
 
 propertyDefaultIfUnset("remoteMappings", "https://raw.githubusercontent.com/MinecraftForge/FML/1.7.10/conf/")
 propertyDefaultIfUnset("mappingsChannel", "stable")
 propertyDefaultIfUnset("mappingsVersion", "12")
 
+if (usesMixins.toBoolean() && !useObsoleteSpongeMixins.toBoolean()) {
+    //1.1.2
+    //Currently using upstream, will make a fork soon(tm)
+    apply from: 'https://raw.githubusercontent.com/tox1cozZ/mixin-booter-legacy/30de05f4c3e41360f423d8c5fd4adc73d4677a37/gradle/configurations/v1.gradle'
+}
+
 String javaSourceDir = "src/main/java/"
 String scalaSourceDir = "src/main/scala/"
 String kotlinSourceDir = "src/main/kotlin/"
@@ -271,43 +278,53 @@ repositories {
         url = "https://gregtech.overminddl1.com/"
     }
     if(usesMixins.toBoolean() || hasMixinDeps.toBoolean()) {
-        maven {
-            name = "sponge"
-            url = "https://sponge.falsepattern.com/"
+        if (useObsoleteSpongeMixins.toBoolean()) {
+            maven {
+                name = "sponge"
+                url = "https://mvn.falsepattern.com/sponge"
+            }
         }
         maven {
-            url = "https://jitpack.falsepattern.com/"
+            url = "https://mvn.falsepattern.com/jitpack"
         }
     }
 }
 
 dependencies {
     if(usesMixins.toBoolean()) {
-        annotationProcessor("org.ow2.asm:asm-debug-all:5.0.3")
-        annotationProcessor("com.google.guava:guava:24.1.1-jre")
-        annotationProcessor("com.google.code.gson:gson:2.8.6")
-        annotationProcessor("org.spongepowered:mixin:0.8-20200110.181151-15")
-        // using 0.8 to workaround a issue in 0.7 which fails mixin application
-        compile("org.spongepowered:mixin:0.7.11-20180703.121122-1") {
-            // Mixin includes a lot of dependencies that are too up-to-date
-            exclude module: "launchwrapper"
-            exclude module: "guava"
-            exclude module: "gson"
-            exclude module: "commons-io"
-            exclude module: "log4j-core"
+        if (useObsoleteSpongeMixins.toBoolean()) {
+            annotationProcessor("org.ow2.asm:asm-debug-all:5.0.3")
+            annotationProcessor("com.google.guava:guava:24.1.1-jre")
+            annotationProcessor("com.google.code.gson:gson:2.8.6")
+            annotationProcessor("org.spongepowered:mixin:0.8-20200110.181151-15")
+            // using 0.8 to workaround a issue in 0.7 which fails mixin application
+            compile("org.spongepowered:mixin:0.7.11-20180703.121122-1") {
+                // Mixin includes a lot of dependencies that are too up-to-date
+                exclude module: "launchwrapper"
+                exclude module: "guava"
+                exclude module: "gson"
+                exclude module: "commons-io"
+                exclude module: "log4j-core"
+            }
+            compile("com.github.GTNewHorizons:SpongeMixins:1.3.3:dev")
+        } else {
+            compile("com.github.tox1cozZ:mixin-booter-legacy:1.1.2")
         }
-        compile("com.github.GTNewHorizons:SpongeMixins:1.3.3:dev")
     }
     if(hasMixinDeps.toBoolean()) {
-        runtime("org.spongepowered:mixin:0.7.11-20180703.121122-1") {
-            // Mixin includes a lot of dependencies that are too up-to-date
-            exclude module: "launchwrapper"
-            exclude module: "guava"
-            exclude module: "gson"
-            exclude module: "commons-io"
-            exclude module: "log4j-core"
+        if (useObsoleteSpongeMixins.toBoolean()) {
+            runtime("org.spongepowered:mixin:0.7.11-20180703.121122-1") {
+                // Mixin includes a lot of dependencies that are too up-to-date
+                exclude module: "launchwrapper"
+                exclude module: "guava"
+                exclude module: "gson"
+                exclude module: "commons-io"
+                exclude module: "log4j-core"
+            }
+            runtime("com.github.GTNewHorizons:SpongeMixins:1.3.3:dev")
+        } else {
+            runtime("com.github.tox1cozZ:mixin-booter-legacy:1.1.2")
         }
-        runtime("com.github.GTNewHorizons:SpongeMixins:1.3.3:dev")
     }
 }
 
@@ -378,7 +395,7 @@ jar {
 }
 
 reobf {
-    if(usesMixins.toBoolean()) {
+    if(usesMixins.toBoolean() && useObsoleteSpongeMixins.toBoolean() && file(mixinSrg).exists()) {
         addExtraSrgFile mixinSrg
     }
 }
@@ -386,10 +403,14 @@ reobf {
 afterEvaluate {
     if(usesMixins.toBoolean()) {
         tasks.compileJava {
+            if (useObsoleteSpongeMixins.toBoolean()) {
+                options.compilerArgs += [
+                        "-AreobfSrgFile=${tasks.reobf.srg}",
+                        "-AoutSrgFile=${mixinSrg}",
+                        "-AoutRefMapFile=${refMap}"
+                ]
+            }
             options.compilerArgs += [
-                    "-AreobfSrgFile=${tasks.reobf.srg}",
-                    "-AoutSrgFile=${mixinSrg}",
-                    "-AoutRefMapFile=${refMap}",
                     // Elan: from what I understand they are just some linter configs so you get some warning on how to properly code
                     "-XDenableSunApiLintControl",
                     "-XDignore.symbol.file"
@@ -694,7 +715,7 @@ task updateBuildScript {
     }
 }
 
-if (!skipBuildScriptUpdateCheck.toBoolean() && isNewBuildScriptVersionAvailable(projectDir.toString())) {
+if (!project.getGradle().startParameter.isOffline() && !skipBuildScriptUpdateCheck.toBoolean() && isNewBuildScriptVersionAvailable(projectDir.toString())) {
     if (autoUpdateBuildScript.toBoolean()) {
         performBuildScriptUpdate(projectDir.toString())
     } else {
diff --git a/dependencies.gradle b/dependencies.gradle
index a020c00..9bbd558 100644
--- a/dependencies.gradle
+++ b/dependencies.gradle
@@ -2,7 +2,7 @@ dependencies {
     compileOnly("org.projectlombok:lombok:1.18.22") {
         transitive = false
     }
-    compileOnly("org.spongepowered:mixin:0.7.11-SNAPSHOT") {
+    compileOnly("com.github.tox1cozZ:mixin-booter-legacy:1.1.2") {
         transitive = false
     }
     compileOnly("com.falsepattern:json:0.4.1")
diff --git a/gradle.properties b/gradle.properties
index 7d72356..a4e5f58 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -70,10 +70,15 @@ mixinPlugin =
 mixinsPackage =
 # Specify a preinit mixin here. Preinit mixins should be used very rarely, if at all, so this mixin config will not be managed by the buildscript, only included.
 mixinPreinitConfig =
+# By default, the buildscript uses mixin-booter-legacy for mixins. You can force the buildscript to use the obsolete SpongeMixins
+# library using this setting.
+# MixinBooterLegacy provides Mixins 0.8.2
+# SpongeMixins provides Mixins 0.7.11 on the official version, and Mixins 0.7.12 on the nh version
+useObsoleteSpongeMixins = false
 # Specify the core mod entry class if you use a core mod. This class must implement IFMLLoadingPlugin!
 # This parameter is for legacy compatability only
 # Example value: coreModClass = asm.FMLPlugin + modGroup = com.myname.mymodid -> com.myname.mymodid.asm.FMLPlugin
-coreModClass = internal.CoreLoadingPlugin
+coreModClass = internal.asm.CoreLoadingPlugin
 # If your project is only a consolidation of mixins or a core mod and does NOT contain a 'normal' mod ( = some class
 # that is annotated with @Mod) you want this to be true. When in doubt: leave it on false!
 containsMixinsAndOrCoreModOnly = false
diff --git a/repositories.gradle b/repositories.gradle
index a60f5f0..3d5cf5e 100644
--- a/repositories.gradle
+++ b/repositories.gradle
@@ -1,7 +1,11 @@
 repositories {
     maven {
         name = "sponge"
-        url = "https://mvn.falsepattern.com/sponge"
+        url = "https://mvn.falsepattern.com/sponge/"
+    }
+    maven {
+        name = "jitpack"
+        url = "https://mvn.falsepattern.com/jitpack/"
     }
     maven {
         name = "mvnpattern"
diff --git a/src/main/java/com/falsepattern/lib/asm/ASMUtil.java b/src/main/java/com/falsepattern/lib/asm/ASMUtil.java
index db8f82d..71f2131 100644
--- a/src/main/java/com/falsepattern/lib/asm/ASMUtil.java
+++ b/src/main/java/com/falsepattern/lib/asm/ASMUtil.java
@@ -24,7 +24,7 @@ import com.falsepattern.lib.StableAPI;
 import com.falsepattern.lib.asm.exceptions.AsmClassNotFoundException;
 import com.falsepattern.lib.asm.exceptions.AsmFieldNotFoundException;
 import com.falsepattern.lib.asm.exceptions.AsmMethodNotFoundException;
-import com.falsepattern.lib.internal.CoreLoadingPlugin;
+import com.falsepattern.lib.internal.asm.CoreLoadingPlugin;
 import com.falsepattern.lib.mapping.MappingManager;
 import com.falsepattern.lib.mapping.types.MappingType;
 import com.falsepattern.lib.mapping.types.NameType;
diff --git a/src/main/java/com/falsepattern/lib/asm/SmartTransformer.java b/src/main/java/com/falsepattern/lib/asm/SmartTransformer.java
index 12996c9..c80e37d 100644
--- a/src/main/java/com/falsepattern/lib/asm/SmartTransformer.java
+++ b/src/main/java/com/falsepattern/lib/asm/SmartTransformer.java
@@ -21,7 +21,7 @@
 package com.falsepattern.lib.asm;
 
 import com.falsepattern.lib.StableAPI;
-import com.falsepattern.lib.internal.CoreLoadingPlugin;
+import com.falsepattern.lib.internal.asm.CoreLoadingPlugin;
 import lombok.val;
 import org.apache.logging.log4j.Logger;
 import org.objectweb.asm.ClassReader;
diff --git a/src/main/java/com/falsepattern/lib/internal/CoreLoadingPlugin.java b/src/main/java/com/falsepattern/lib/internal/asm/CoreLoadingPlugin.java
similarity index 92%
rename from src/main/java/com/falsepattern/lib/internal/CoreLoadingPlugin.java
rename to src/main/java/com/falsepattern/lib/internal/asm/CoreLoadingPlugin.java
index 34c4332..b1f5b7f 100644
--- a/src/main/java/com/falsepattern/lib/internal/CoreLoadingPlugin.java
+++ b/src/main/java/com/falsepattern/lib/internal/asm/CoreLoadingPlugin.java
@@ -18,8 +18,10 @@
  * You should have received a copy of the GNU Lesser General Public License
  * along with this program.  If not, see <https://www.gnu.org/licenses/>.
  */
-package com.falsepattern.lib.internal;
+package com.falsepattern.lib.internal.asm;
 
+import com.falsepattern.lib.internal.Tags;
+import com.falsepattern.lib.internal.asm.FPTransformer;
 import lombok.Getter;
 import lombok.val;
 
@@ -36,6 +38,7 @@ import java.util.Map;
 @MCVersion("1.7.10")
 @Name(Tags.MODID)
 @SortingIndex(500)
+@IFMLLoadingPlugin.TransformerExclusions({Tags.GROUPNAME + ".internal.asm", Tags.GROUPNAME + ".asm"})
 public class CoreLoadingPlugin implements IFMLLoadingPlugin {
     @Getter
     private static boolean obfuscated;
@@ -101,7 +104,7 @@ public class CoreLoadingPlugin implements IFMLLoadingPlugin {
 
     @Override
     public String[] getASMTransformerClass() {
-        return null;
+        return new String[]{Tags.GROUPNAME + ".internal.asm.FPTransformer"};
     }
 
     @Override
diff --git a/src/main/java/com/falsepattern/lib/internal/asm/FPTransformer.java b/src/main/java/com/falsepattern/lib/internal/asm/FPTransformer.java
new file mode 100644
index 0000000..fac9d3e
--- /dev/null
+++ b/src/main/java/com/falsepattern/lib/internal/asm/FPTransformer.java
@@ -0,0 +1,36 @@
+package com.falsepattern.lib.internal.asm;
+
+import com.falsepattern.lib.StableAPI;
+import com.falsepattern.lib.asm.IClassNodeTransformer;
+import com.falsepattern.lib.asm.SmartTransformer;
+import com.falsepattern.lib.internal.Tags;
+import lombok.Getter;
+import lombok.experimental.Accessors;
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
+
+import java.util.Collections;
+import java.util.List;
+
+@Accessors(fluent = true)
+@StableAPI(since = "__INTERNAL__")
+public class FPTransformer implements SmartTransformer {
+    @Getter
+    private final List<IClassNodeTransformer> transformers;
+
+    @Getter
+    private final Logger logger = LogManager.getLogger(Tags.MODNAME + " ASM");
+
+    public FPTransformer() {
+        boolean obsolete;
+        try {
+            Class.forName("io.github.tox1cozz.mixinbooterlegacy.MixinBooterLegacyPlugin");
+            logger.info("Detected MixinBooter Legacy.");
+            obsolete = false;
+        } catch (ClassNotFoundException e) {
+            logger.info("Detected SpongeMixins or Grimoire. Applying legacy compat fix to IMixinPlugin.");
+            obsolete = true;
+        }
+        transformers = Collections.singletonList(new IMixinPluginTransformer(obsolete));
+    }
+}
diff --git a/src/main/java/com/falsepattern/lib/internal/asm/IMixinPluginTransformer.java b/src/main/java/com/falsepattern/lib/internal/asm/IMixinPluginTransformer.java
new file mode 100644
index 0000000..5d2a72e
--- /dev/null
+++ b/src/main/java/com/falsepattern/lib/internal/asm/IMixinPluginTransformer.java
@@ -0,0 +1,50 @@
+package com.falsepattern.lib.internal.asm;
+
+import com.falsepattern.lib.asm.IClassNodeTransformer;
+import com.falsepattern.lib.internal.Tags;
+import lombok.RequiredArgsConstructor;
+import lombok.val;
+import org.objectweb.asm.tree.ClassNode;
+import org.objectweb.asm.tree.MethodNode;
+
+import java.util.ArrayList;
+
+@RequiredArgsConstructor
+public class IMixinPluginTransformer implements IClassNodeTransformer {
+    private final boolean obsolete;
+
+    @Override
+    public String getName() {
+        return "IMixinPluginTransformer";
+    }
+
+    @Override
+    public boolean shouldTransform(ClassNode cn, String transformedName, boolean obfuscated) {
+        return transformedName.equals(Tags.GROUPNAME + ".mixin.IMixinPlugin");
+    }
+
+    @Override
+    public void transform(ClassNode cn, String transformedName, boolean obfuscated) {
+        val methods = cn.methods;
+        val remove = new ArrayList<MethodNode>();
+        if (obsolete) {
+            for (val method : methods) {
+                if (method.name.equals("preApply") || method.name.equals("postApply")) {
+                    remove.add(method);
+                }
+            }
+            methods.removeAll(remove);
+            for (val method : methods) {
+                if (method.name.equals("preApply_obsolete") || method.name.equals("postApply_obsolete")) {
+                    method.name = method.name.substring(0, method.name.indexOf('_'));
+                }
+            }
+        } else {
+            for (val method : methods) {
+                if (method.name.equals("preApply_obsolete") || method.name.equals("postApply_obsolete")) {
+                    remove.add(method);
+                }
+            }
+        }
+    }
+}
diff --git a/src/main/java/com/falsepattern/lib/mapping/MappingManager.java b/src/main/java/com/falsepattern/lib/mapping/MappingManager.java
index 90247ce..8f1c1a9 100644
--- a/src/main/java/com/falsepattern/lib/mapping/MappingManager.java
+++ b/src/main/java/com/falsepattern/lib/mapping/MappingManager.java
@@ -24,7 +24,7 @@ import com.falsepattern.lib.StableAPI;
 import com.falsepattern.lib.dependencies.DependencyLoader;
 import com.falsepattern.lib.dependencies.Library;
 import com.falsepattern.lib.dependencies.SemanticVersion;
-import com.falsepattern.lib.internal.CoreLoadingPlugin;
+import com.falsepattern.lib.internal.asm.CoreLoadingPlugin;
 import com.falsepattern.lib.mapping.storage.Lookup;
 import com.falsepattern.lib.mapping.types.MappingType;
 import com.falsepattern.lib.mapping.types.NameType;
diff --git a/src/main/java/com/falsepattern/lib/mapping/types/UniversalClass.java b/src/main/java/com/falsepattern/lib/mapping/types/UniversalClass.java
index b6fbd31..1c7ba9a 100644
--- a/src/main/java/com/falsepattern/lib/mapping/types/UniversalClass.java
+++ b/src/main/java/com/falsepattern/lib/mapping/types/UniversalClass.java
@@ -21,7 +21,7 @@
 package com.falsepattern.lib.mapping.types;
 
 import com.falsepattern.lib.StableAPI;
-import com.falsepattern.lib.internal.CoreLoadingPlugin;
+import com.falsepattern.lib.internal.asm.CoreLoadingPlugin;
 import com.falsepattern.lib.mapping.storage.Lookup;
 import com.falsepattern.lib.mapping.storage.MappedString;
 import lombok.EqualsAndHashCode;
diff --git a/src/main/java/com/falsepattern/lib/mixin/IMixinPlugin.java b/src/main/java/com/falsepattern/lib/mixin/IMixinPlugin.java
index 4cf177e..d39e9a6 100644
--- a/src/main/java/com/falsepattern/lib/mixin/IMixinPlugin.java
+++ b/src/main/java/com/falsepattern/lib/mixin/IMixinPlugin.java
@@ -73,26 +73,31 @@ public interface IMixinPlugin extends IMixinConfigPlugin {
     ITargetedMod[] getTargetedModEnumValues();
 
     @Override
+    @StableAPI.Expose(since = "__INTERNAL__")
     default void onLoad(String mixinPackage) {
 
     }
 
     @Override
+    @StableAPI.Expose(since = "__INTERNAL__")
     default String getRefMapperConfig() {
         return null;
     }
 
     @Override
+    @StableAPI.Expose(since = "__INTERNAL__")
     default boolean shouldApplyMixin(String targetClassName, String mixinClassName) {
         return true;
     }
 
     @Override
+    @StableAPI.Expose(since = "__INTERNAL__")
     default void acceptTargets(Set<String> myTargets, Set<String> otherTargets) {
 
     }
 
     @Override
+    @StableAPI.Expose(since = "__INTERNAL__")
     default List<String> getMixins() {
         val isDevelopmentEnvironment = (boolean) Launch.blackboard.get("fml.deobfuscatedEnvironment");
         val targetedMods = getTargetedModEnumValues();
@@ -119,6 +124,7 @@ public interface IMixinPlugin extends IMixinConfigPlugin {
         return mixins;
     }
 
+    @StableAPI.Expose(since = "__INTERNAL__")
     default boolean loadJarOf(final ITargetedMod mod) {
         boolean success = false;
         try {
@@ -140,13 +146,37 @@ public interface IMixinPlugin extends IMixinConfigPlugin {
         return success;
     }
 
-    @Override
-    default void preApply(String targetClassName, ClassNode targetClass, String mixinClassName, IMixinInfo mixinInfo) {
+    /**
+     * Fallback for spongemixins. Removed for mixinbooter
+     */
+    @StableAPI.Expose(since = "__INTERNAL__")
+    default void preApply_obsolete(String targetClassName, ClassNode targetClass, String mixinClassName, IMixinInfo mixinInfo) {
 
     }
 
+    /**
+     * Fallback for spongemixins. Removed for mixinbooter
+     */
+    @StableAPI.Expose(since = "__INTERNAL__")
+    default void postApply_obsolete(String targetClassName, ClassNode targetClass, String mixinClassName, IMixinInfo mixinInfo) {
+
+    }
+
+    /**
+     * Regular behaviour for mixinbooter. Removed for spongemixins
+     */
     @Override
-    default void postApply(String targetClassName, ClassNode targetClass, String mixinClassName, IMixinInfo mixinInfo) {
+    @StableAPI.Expose(since = "__INTERNAL__")
+    default void preApply(String targetClassName, org.spongepowered.libraries.org.objectweb.asm.tree.ClassNode targetClass, String mixinClassName, IMixinInfo mixinInfo) {
+
+    }
+
+    /**
+     * Regular behaviour for mixinbooter. Removed for spongemixins
+     */
+    @Override
+    @StableAPI.Expose(since = "__INTERNAL__")
+    default void postApply(String targetClassName, org.spongepowered.libraries.org.objectweb.asm.tree.ClassNode targetClass, String mixinClassName, IMixinInfo mixinInfo) {
 
     }
 }