diff --git a/benchmarks/Android.mk b/benchmarks/Android.mk
index 989e9e6..c3eb6d3 100644
--- a/benchmarks/Android.mk
+++ b/benchmarks/Android.mk
@@ -28,6 +28,9 @@
 LOCAL_EXPORT_C_INCLUDE_DIRS := $(LOCAL_PATH)/include
 include $(BUILD_STATIC_LIBRARY)
 
+# Only supported on linux systems.
+ifeq ($(HOST_OS),linux)
+
 include $(CLEAR_VARS)
 LOCAL_MODULE := libbenchmark
 LOCAL_CFLAGS += -O2 -Wall -Wextra -Werror
@@ -37,6 +40,8 @@
 LOCAL_MULTILIB := both
 include $(BUILD_HOST_STATIC_LIBRARY)
 
+endif
+
 # -----------------------------------------------------------------------------
 # Benchmarks.
 # -----------------------------------------------------------------------------
@@ -76,6 +81,9 @@
 # performance of the old release's libc, and a static benchmark isn't
 # going to let you do that.
 
+# Only supported on linux systems.
+ifeq ($(HOST_OS),linux)
+
 # Build benchmarks for the host (against glibc!). Run with:
 include $(CLEAR_VARS)
 LOCAL_MODULE := bionic-benchmarks-glibc
@@ -88,6 +96,8 @@
 LOCAL_STATIC_LIBRARIES += libbenchmark
 include $(BUILD_HOST_EXECUTABLE)
 
+endif
+
 ifeq ($(HOST_OS)-$(HOST_ARCH),$(filter $(HOST_OS)-$(HOST_ARCH),linux-x86 linux-x86_64))
 include $(LOCAL_PATH)/../build/run-on-host.mk