diff --git a/samples/androidNativeActivity/build.gradle b/samples/androidNativeActivity/build.gradle
index 557c0dbc8ba..b8911cf8416 100644
--- a/samples/androidNativeActivity/build.gradle
+++ b/samples/androidNativeActivity/build.gradle
@@ -25,32 +25,13 @@ allprojects {
 
 apply plugin: "konan"
 
-konanInterop {
-    arm32 {
-        defFile "android.def"
-        pkg "android"
-        // TODO: launcher header will be part of the platform library.
-        includeDirs "."
-        target "android_arm32"
-    }
-    arm64 {
-        defFile "android.def"
-        pkg "android"
-        // TODO: launcher header will be part of the platform library.
-        includeDirs "."
-        target "android_arm64"
-    }
-}
-
 konanArtifacts {
     PolyhedronArm32 {
-        useInterop "arm32"
         target "android_arm32"
         outputDir 'PolyhedronArm32'
         outputName 'libpoly'
     }
     PolyhedronArm64 {
-        useInterop "arm64"
         target "android_arm64"
         outputDir 'PolyhedronArm64'
         outputName 'libpoly'
diff --git a/samples/androidNativeActivity/src/main/kotlin/engine.kt b/samples/androidNativeActivity/src/main/kotlin/engine.kt
index 2ce81fab2db..909f051a7fb 100644
--- a/samples/androidNativeActivity/src/main/kotlin/engine.kt
+++ b/samples/androidNativeActivity/src/main/kotlin/engine.kt
@@ -15,7 +15,10 @@
  */
 
 import kotlinx.cinterop.*
-import android.*
+import platform.android.*
+import platform.posix.*
+import platform.gles3.*
+import platform.linux.*
 
 fun logError(message: String) {
     __android_log_write(ANDROID_LOG_ERROR, "KonanActivity", message)
@@ -26,7 +29,7 @@ fun logInfo(message: String) {
 }
 
 val errno: Int
-    get() = interop_errno()
+    get() = posix_errno()
 
 fun getUnixError() = strerror(errno)!!.toKString()
 
@@ -95,7 +98,7 @@ class Engine(val arena: NativePlacement, val state: NativeActivityState) {
 
     private fun processSysEvent(fd: IntVar): Boolean = memScoped {
         val eventPointer = alloc<COpaquePointerVar>()
-        val readBytes = read(fd.value, eventPointer.ptr, pointerSize.signExtend<size_t>()).toLong()
+        val readBytes = read(fd.value, eventPointer.ptr, pointerSize.signExtend<platform.posix.size_t>()).toLong()
         if (readBytes != pointerSize.toLong()) {
             logError("Failure reading event, $readBytes read: ${getUnixError()}")
             return true
@@ -138,7 +141,7 @@ class Engine(val arena: NativePlacement, val state: NativeActivityState) {
                 NativeActivityEventKind.SAVE_INSTANCE_STATE -> {
                     val saveStateEvent = eventPointer.value.dereferenceAs<NativeActivitySaveStateEvent>()
                     val state = renderer.getState()
-                    val dataSize = state.second.signExtend<size_t>()
+                    val dataSize = state.second.signExtend<platform.posix.size_t>()
                     rendererState = realloc(rendererState, dataSize)
                     memcpy(rendererState, state.first, dataSize)
                     saveStateEvent.savedState = rendererState
@@ -160,7 +163,7 @@ class Engine(val arena: NativePlacement, val state: NativeActivityState) {
     }
 
     private fun getEventPoint(event: CPointer<AInputEvent>?, i: Int) =
-            Vector2(AMotionEvent_getRawX(event, i.signExtend<size_t>()), AMotionEvent_getRawY(event, i.signExtend<size_t>()))
+            Vector2(AMotionEvent_getRawX(event, i.signExtend<platform.posix.size_t>()), AMotionEvent_getRawY(event, i.signExtend<platform.posix.size_t>()))
 
     private fun getEventTime(event: CPointer<AInputEvent>?) =
             AMotionEvent_getEventTime(event) / 1_000_000_000.0f
diff --git a/samples/androidNativeActivity/src/main/kotlin/renderer.kt b/samples/androidNativeActivity/src/main/kotlin/renderer.kt
index 1c93e26e197..d79575e96cb 100644
--- a/samples/androidNativeActivity/src/main/kotlin/renderer.kt
+++ b/samples/androidNativeActivity/src/main/kotlin/renderer.kt
@@ -15,7 +15,46 @@
  */
 
 import kotlinx.cinterop.*
-import android.*
+import platform.android.*
+import platform.egl.*
+import platform.posix.*
+import platform.gles3.*
+import platform.gles.GL_PERSPECTIVE_CORRECTION_HINT
+import platform.gles.GL_SMOOTH
+import platform.gles.GL_PROJECTION
+import platform.gles.glLoadIdentity
+import platform.gles.glFrustumf
+import platform.gles.glMatrixMode
+import platform.gles.GL_MODELVIEW
+import platform.gles.glTranslatef
+import platform.gles.glShadeModel
+import platform.gles.GL_LIGHT0
+import platform.gles.GL_POSITION
+import platform.gles.glMaterialfv
+import platform.gles.GL_DIFFUSE
+import platform.gles.GL_SHININESS
+import platform.gles.glPushMatrix
+import platform.gles.glRotatef
+import platform.gles.glMultMatrixf
+import platform.gles.GL_MODELVIEW_MATRIX
+import platform.gles.glPopMatrix
+import platform.gles.glTexEnvf
+import platform.gles.GL_TEXTURE_ENV
+import platform.gles.GL_TEXTURE_ENV_MODE
+import platform.gles.glLightfv
+import platform.gles.GL_LIGHTING
+import platform.gles.GL_SPECULAR
+import platform.gles.glMaterialf
+import platform.gles.glTexEnvfv
+import platform.gles.glEnableClientState
+import platform.gles.GL_VERTEX_ARRAY
+import platform.gles.GL_NORMAL_ARRAY
+import platform.gles.GL_TEXTURE_COORD_ARRAY
+import platform.gles.glVertexPointer
+import platform.gles.glTexCoordPointer
+import platform.gles.glNormalPointer
+import platform.gles.GL_TEXTURE_ENV_COLOR
+
 
 class Renderer(val parentArena: NativePlacement, val nativeActivity: ANativeActivity, val savedMatrix: COpaquePointer?) {
 
@@ -294,7 +333,7 @@ class Renderer(val parentArena: NativePlacement, val nativeActivity: ANativeActi
         surface = null
         context = null
         initialized = false
-
-        arena.clear()
+        // TODO: What should be called here?
+        //arena.clear()
     }
-}
\ No newline at end of file
+}
diff --git a/samples/androidNativeActivity/src/main/kotlin/vectors.kt b/samples/androidNativeActivity/src/main/kotlin/vectors.kt
index 86d30335e13..062661c51b9 100644
--- a/samples/androidNativeActivity/src/main/kotlin/vectors.kt
+++ b/samples/androidNativeActivity/src/main/kotlin/vectors.kt
@@ -15,7 +15,8 @@
  */
 
 import kotlinx.cinterop.*
-import android.*
+import platform.android.*
+import platform.posix.*
 
 class Vector2(val x: Float, val y: Float) {
     val length by lazy { sqrtf(x * x + y * y) }
diff --git a/samples/gradle/wrapper/gradle-wrapper.properties b/samples/gradle/wrapper/gradle-wrapper.properties
index 52dd1f04434..293fd09bfd9 100644
--- a/samples/gradle/wrapper/gradle-wrapper.properties
+++ b/samples/gradle/wrapper/gradle-wrapper.properties
@@ -2,4 +2,4 @@ distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-4.2-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-3.3-bin.zip