diff --git a/.gitignore b/.gitignore
index c7a7ebe..c4af998 100644
--- a/.gitignore
+++ b/.gitignore
@@ -8,3 +8,4 @@ out/
 /.fleet/*
 .DS_Store
 .intellijPlatform
+.kotlin/
diff --git a/evaluator/src/main/kotlin/gay/pizza/pork/evaluator/EvaluatorProvider.kt b/evaluator/src/main/kotlin/gay/pizza/pork/evaluator/EvaluatorProvider.kt
index 9aa4c1f..ff6a6c3 100644
--- a/evaluator/src/main/kotlin/gay/pizza/pork/evaluator/EvaluatorProvider.kt
+++ b/evaluator/src/main/kotlin/gay/pizza/pork/evaluator/EvaluatorProvider.kt
@@ -11,7 +11,11 @@ class EvaluatorProvider(val world: World) : ExecutionContextProvider {
   override fun prepare(importLocator: ImportLocator, entryPointSymbol: Symbol, nativeRegistry: NativeRegistry): ExecutionContext {
     val evaluator = Evaluator(world)
     nativeRegistry.forEachProvider { form, provider ->
-      evaluator.addNativeProvider(form, AdaptedNativeProvider(provider))
+      if (provider is ExpandedNativeProvider) {
+        evaluator.addNativeProvider(form, provider)
+      } else {
+        evaluator.addNativeProvider(form, AdaptedNativeProvider(provider))
+      }
     }
     val slab = evaluator.slabContext(importLocator)
     slab.finalizeScope()
diff --git a/execution/src/main/kotlin/gay/pizza/pork/execution/InternalNativeProvider.kt b/execution/src/main/kotlin/gay/pizza/pork/execution/InternalNativeProvider.kt
index 7048214..a816e04 100644
--- a/execution/src/main/kotlin/gay/pizza/pork/execution/InternalNativeProvider.kt
+++ b/execution/src/main/kotlin/gay/pizza/pork/execution/InternalNativeProvider.kt
@@ -34,7 +34,7 @@ class InternalNativeProvider(val quiet: Boolean = false) : NativeProvider {
     @Suppress("UNCHECKED_CAST")
     val list = arguments[0] as MutableList<Any>
     val value = arguments[2]
-    list[(arguments.at<Number>(0)).toInt()] = value
+    list[(arguments.at<Number>(1)).toInt()] = value
     return value
   }
 
diff --git a/ffi/src/main/kotlin/gay/pizza/pork/ffi/FfiNativeProvider.kt b/ffi/src/main/kotlin/gay/pizza/pork/ffi/FfiNativeProvider.kt
index a82d1c6..4f23b67 100644
--- a/ffi/src/main/kotlin/gay/pizza/pork/ffi/FfiNativeProvider.kt
+++ b/ffi/src/main/kotlin/gay/pizza/pork/ffi/FfiNativeProvider.kt
@@ -5,12 +5,14 @@ import com.kenai.jffi.Function
 import gay.pizza.pork.ast.gen.ArgumentSpec
 import gay.pizza.pork.evaluator.*
 import gay.pizza.pork.execution.ArgumentList
+import gay.pizza.pork.execution.NativeFunction
+import gay.pizza.pork.execution.NativeProvider
 import gay.pizza.pork.execution.None
 import kotlin.io.path.Path
 import kotlin.io.path.absolutePathString
 import kotlin.io.path.exists
 
-class FfiNativeProvider : ExpandedNativeProvider {
+class FfiNativeProvider : ExpandedNativeProvider, NativeProvider {
   private val internalFunctions = mutableMapOf<String, (ArgumentList) -> Any>(
     "ffiStructDefine" to ::ffiStructDefine,
     "ffiStructAllocate" to ::ffiStructAllocate,
@@ -208,6 +210,10 @@ class FfiNativeProvider : ExpandedNativeProvider {
     return structType.read(address, 0)
   }
 
+  override fun provideNativeFunction(definitions: List<String>): NativeFunction {
+    throw RuntimeException("Invalid Native Function Usage")
+  }
+
   companion object {
     fun typeConversion(type: FfiType): Type = when (type) {
       FfiPrimitiveType.UnsignedByte -> Type.UINT8
diff --git a/ffi/src/main/kotlin/gay/pizza/pork/ffi/JavaNativeProvider.kt b/ffi/src/main/kotlin/gay/pizza/pork/ffi/JavaNativeProvider.kt
index 09ee76a..4836314 100644
--- a/ffi/src/main/kotlin/gay/pizza/pork/ffi/JavaNativeProvider.kt
+++ b/ffi/src/main/kotlin/gay/pizza/pork/ffi/JavaNativeProvider.kt
@@ -4,11 +4,13 @@ import gay.pizza.pork.ast.gen.ArgumentSpec
 import gay.pizza.pork.evaluator.CallableFunction
 import gay.pizza.pork.evaluator.SlabContext
 import gay.pizza.pork.evaluator.ExpandedNativeProvider
+import gay.pizza.pork.execution.NativeFunction
+import gay.pizza.pork.execution.NativeProvider
 import gay.pizza.pork.execution.None
 import java.lang.invoke.MethodHandles
 import java.lang.invoke.MethodType
 
-class JavaNativeProvider : ExpandedNativeProvider {
+class JavaNativeProvider : ExpandedNativeProvider, NativeProvider {
   private val lookup = MethodHandles.lookup()
 
   override fun provideNativeFunction(
@@ -62,4 +64,8 @@ class JavaNativeProvider : ExpandedNativeProvider {
     "static-setter" -> lookup.findStaticSetter(javaClass, symbol, returnType)
     else -> throw RuntimeException("Unknown Handle Kind: $kind")
   }
+
+  override fun provideNativeFunction(definitions: List<String>): NativeFunction {
+    throw RuntimeException("Invalid Native Function Usage")
+  }
 }
diff --git a/tool/src/main/kotlin/gay/pizza/pork/tool/RunCommand.kt b/tool/src/main/kotlin/gay/pizza/pork/tool/RunCommand.kt
index 14440b2..536bf1d 100644
--- a/tool/src/main/kotlin/gay/pizza/pork/tool/RunCommand.kt
+++ b/tool/src/main/kotlin/gay/pizza/pork/tool/RunCommand.kt
@@ -10,6 +10,8 @@ import gay.pizza.dough.fs.PlatformFsProvider
 import gay.pizza.pork.ast.gen.Symbol
 import gay.pizza.pork.execution.InternalNativeProvider
 import gay.pizza.pork.execution.NativeRegistry
+import gay.pizza.pork.ffi.FfiNativeProvider
+import gay.pizza.pork.ffi.JavaNativeProvider
 import gay.pizza.pork.minimal.ExecutionType
 import gay.pizza.pork.minimal.FileTool
 
@@ -26,6 +28,8 @@ class RunCommand : CliktCommand(help = "Run Program", name = "run") {
     val tool = FileTool(PlatformFsProvider.resolve(path))
     val nativeRegistry = NativeRegistry()
     nativeRegistry.add("internal", InternalNativeProvider(quiet = quiet))
+    nativeRegistry.add("java", JavaNativeProvider())
+    nativeRegistry.add("ffi", FfiNativeProvider())
     val main = tool.createExecutionContext(executionType, Symbol("main"), nativeRegistry)
     maybeLoopAndMeasure(loop, measure) {
       main.execute()