diff --git a/libs/host/Android.mk b/libs/host/Android.mk
index 8a28457..bc25e4b 100644
--- a/libs/host/Android.mk
+++ b/libs/host/Android.mk
@@ -5,11 +5,11 @@
     CopyFile.c
 
 LOCAL_CFLAGS := -Werror -Wall
-LOCAL_CFLAGS_darwin += -DMACOSX_RSRC
 
 LOCAL_MODULE:= libhost
 LOCAL_MODULE_HOST_OS := darwin linux windows
 LOCAL_C_INCLUDES := $(LOCAL_PATH)/include
+LOCAL_EXPORT_C_INCLUDE_DIRS := $(LOCAL_PATH)/include
 LOCAL_CXX_STL := none
 
 # acp uses libhost, so we can't use
diff --git a/libs/host/CopyFile.c b/libs/host/CopyFile.c
index 1b55723..5be012c 100644
--- a/libs/host/CopyFile.c
+++ b/libs/host/CopyFile.c
@@ -68,8 +68,8 @@
 static bool isHiresMtime(const struct stat* pSrcStat)
 {
 #if defined(_WIN32)
-  return 0;
-#elif defined(MACOSX_RSRC)
+    return 0;
+#elif defined(__APPLE__)
     return pSrcStat->st_mtimespec.tv_nsec > 0;
 #else
     return pSrcStat->st_mtim.tv_nsec > 0;
@@ -295,7 +295,8 @@
     if (copyResult != 0)
         return -1;
 
-#ifdef MACOSX_RSRC
+#if defined(__APPLE__)
+    // Copy Mac OS X resource forks too.
     {
         char* srcRsrcName = NULL;
         char* dstRsrcName = NULL;
diff --git a/tools/acp/Android.mk b/tools/acp/Android.mk
index e31ad3a..eec9c9d 100644
--- a/tools/acp/Android.mk
+++ b/tools/acp/Android.mk
@@ -3,20 +3,13 @@
 # Custom version of cp.
 
 LOCAL_PATH:= $(call my-dir)
+
 include $(CLEAR_VARS)
-LOCAL_ADDITIONAL_DEPENDENCIES := $(LOCAL_PATH)/Android.mk
 
 LOCAL_SRC_FILES := \
     acp.c
 
-ifeq ($(HOST_OS),darwin)
-LOCAL_CFLAGS += -DMACOSX_RSRC
-endif
-ifeq ($(HOST_OS),linux)
-endif
-
 LOCAL_STATIC_LIBRARIES := libhost
-LOCAL_C_INCLUDES := build/libs/host/include
 LOCAL_MODULE := acp
 LOCAL_ACP_UNAVAILABLE := true
 LOCAL_CXX_STL := none
diff --git a/tools/atree/Android.mk b/tools/atree/Android.mk
index d895810..f598db5 100644
--- a/tools/atree/Android.mk
+++ b/tools/atree/Android.mk
@@ -12,7 +12,6 @@
 
 LOCAL_STATIC_LIBRARIES := \
 	libhost
-LOCAL_C_INCLUDES := build/libs/host/include
 
 LOCAL_MODULE := atree