diff --git a/trusty/Android.bp b/trusty/Android.bp
index 9681488..386fbe6 100644
--- a/trusty/Android.bp
+++ b/trusty/Android.bp
@@ -1,4 +1,7 @@
 subdirs = [
+    "gatekeeper",
+    "keymaster",
     "libtrusty",
+    "nvram",
     "storage/*",
 ]
diff --git a/trusty/gatekeeper/Android.bp b/trusty/gatekeeper/Android.bp
new file mode 100644
index 0000000..a9566a1
--- /dev/null
+++ b/trusty/gatekeeper/Android.bp
@@ -0,0 +1,46 @@
+//
+// Copyright (C) 2015 The Android Open-Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+
+// WARNING: Everything listed here will be built on ALL platforms,
+// including x86, the emulator, and the SDK.  Modules must be uniquely
+// named (liblights.panda), and must build everywhere, or limit themselves
+// to only building on ARM if they include assembly. Individual makefiles
+// are responsible for having their own logic, for fine-grained control.
+
+cc_library_shared {
+    name: "gatekeeper.trusty",
+
+    relative_install_path: "hw",
+
+    srcs: [
+        "module.cpp",
+        "trusty_gatekeeper_ipc.c",
+        "trusty_gatekeeper.cpp",
+    ],
+
+    cflags: [
+        "-fvisibility=hidden",
+        "-Wall",
+        "-Werror",
+    ],
+
+    shared_libs: [
+        "libgatekeeper",
+        "liblog",
+        "libcutils",
+        "libtrusty",
+    ],
+}
diff --git a/trusty/gatekeeper/Android.mk b/trusty/gatekeeper/Android.mk
deleted file mode 100644
index 3982c8f..0000000
--- a/trusty/gatekeeper/Android.mk
+++ /dev/null
@@ -1,46 +0,0 @@
-#
-# Copyright (C) 2015 The Android Open-Source Project
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#      http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-#
-
-# WARNING: Everything listed here will be built on ALL platforms,
-# including x86, the emulator, and the SDK.  Modules must be uniquely
-# named (liblights.panda), and must build everywhere, or limit themselves
-# to only building on ARM if they include assembly. Individual makefiles
-# are responsible for having their own logic, for fine-grained control.
-
-LOCAL_PATH:= $(call my-dir)
-
-include $(CLEAR_VARS)
-
-LOCAL_MODULE := gatekeeper.trusty
-
-LOCAL_MODULE_RELATIVE_PATH := hw
-
-LOCAL_SRC_FILES := \
-	module.cpp \
-	trusty_gatekeeper_ipc.c \
-	trusty_gatekeeper.cpp
-
-LOCAL_CLFAGS = -fvisibility=hidden -Wall -Werror
-
-LOCAL_SHARED_LIBRARIES := \
-	libgatekeeper \
-	liblog \
-	libcutils \
-	libtrusty
-
-LOCAL_MODULE_TAGS := optional
-
-include $(BUILD_SHARED_LIBRARY)
diff --git a/trusty/keymaster/Android.bp b/trusty/keymaster/Android.bp
new file mode 100644
index 0000000..3b6867c
--- /dev/null
+++ b/trusty/keymaster/Android.bp
@@ -0,0 +1,67 @@
+//
+// Copyright (C) 2015 The Android Open-Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+
+// WARNING: Everything listed here will be built on ALL platforms,
+// including x86, the emulator, and the SDK.  Modules must be uniquely
+// named (liblights.panda), and must build everywhere, or limit themselves
+// to only building on ARM if they include assembly. Individual makefiles
+// are responsible for having their own logic, for fine-grained control.
+
+// trusty_keymaster is a binary used only for on-device testing.  It
+// runs Trusty Keymaster through a basic set of operations with RSA
+// and ECDSA keys.
+cc_binary {
+    name: "trusty_keymaster_tipc",
+    srcs: [
+        "trusty_keymaster_device.cpp",
+        "trusty_keymaster_ipc.cpp",
+        "trusty_keymaster_main.cpp",
+    ],
+    shared_libs: [
+        "libcrypto",
+        "libcutils",
+        "libkeymaster1",
+        "libtrusty",
+        "libkeymaster_messages",
+        "libsoftkeymasterdevice",
+        "liblog",
+    ],
+}
+
+// keystore.trusty is the HAL used by keystore on Trusty devices.
+cc_library_shared {
+    name: "keystore.trusty",
+    relative_install_path: "hw",
+    srcs: [
+        "module.cpp",
+        "trusty_keymaster_ipc.cpp",
+        "trusty_keymaster_device.cpp",
+    ],
+
+    cflags: [
+        "-fvisibility=hidden",
+        "-Wall",
+        "-Werror",
+    ],
+
+    shared_libs: [
+        "libcrypto",
+        "libkeymaster_messages",
+        "libtrusty",
+        "liblog",
+        "libcutils",
+    ],
+}
diff --git a/trusty/keymaster/Android.mk b/trusty/keymaster/Android.mk
deleted file mode 100644
index 2d614ae..0000000
--- a/trusty/keymaster/Android.mk
+++ /dev/null
@@ -1,68 +0,0 @@
-#
-# Copyright (C) 2015 The Android Open-Source Project
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#      http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-#
-
-# WARNING: Everything listed here will be built on ALL platforms,
-# including x86, the emulator, and the SDK.  Modules must be uniquely
-# named (liblights.panda), and must build everywhere, or limit themselves
-# to only building on ARM if they include assembly. Individual makefiles
-# are responsible for having their own logic, for fine-grained control.
-
-LOCAL_PATH:= $(call my-dir)
-
-include $(CLEAR_VARS)
-
-###
-# trusty_keymaster is a binary used only for on-device testing.  It
-# runs Trusty Keymaster through a basic set of operations with RSA
-# and ECDSA keys.
-###
-LOCAL_MODULE := trusty_keymaster_tipc
-LOCAL_SRC_FILES := \
-	trusty_keymaster_device.cpp \
-	trusty_keymaster_ipc.cpp \
-	trusty_keymaster_main.cpp
-LOCAL_SHARED_LIBRARIES := \
-	libcrypto \
-	libcutils \
-	libkeymaster1 \
-	libtrusty \
-	libkeymaster_messages \
-	libsoftkeymasterdevice \
-	liblog
-
-include $(BUILD_EXECUTABLE)
-
-###
-# keystore.trusty is the HAL used by keystore on Trusty devices.
-##
-
-include $(CLEAR_VARS)
-
-LOCAL_MODULE := keystore.trusty
-LOCAL_MODULE_RELATIVE_PATH := hw
-LOCAL_SRC_FILES := module.cpp \
-	trusty_keymaster_ipc.cpp \
-	trusty_keymaster_device.cpp
-LOCAL_CLFAGS = -fvisibility=hidden -Wall -Werror
-LOCAL_SHARED_LIBRARIES := \
-	libcrypto \
-	libkeymaster_messages \
-	libtrusty \
-	liblog \
-	libcutils
-LOCAL_MODULE_TAGS := optional
-
-include $(BUILD_SHARED_LIBRARY)
diff --git a/trusty/nvram/Android.bp b/trusty/nvram/Android.bp
new file mode 100644
index 0000000..15e6c3e
--- /dev/null
+++ b/trusty/nvram/Android.bp
@@ -0,0 +1,61 @@
+//
+// Copyright (C) 2016 The Android Open-Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+
+// nvram.trusty is the Trusty NVRAM HAL module.
+cc_library_shared {
+    name: "nvram.trusty",
+    relative_install_path: "hw",
+    srcs: [
+        "module.c",
+        "trusty_nvram_device.cpp",
+        "trusty_nvram_implementation.cpp",
+    ],
+
+    cflags: [
+        "-Wall",
+        "-Werror",
+        "-Wextra",
+        "-fvisibility=hidden",
+    ],
+    static_libs: ["libnvram-hal"],
+    shared_libs: [
+        "libtrusty",
+        "libnvram-messages",
+        "liblog",
+    ],
+}
+
+// nvram-wipe is a helper tool for clearing NVRAM state.
+cc_binary {
+    name: "nvram-wipe",
+    srcs: [
+        "nvram_wipe.cpp",
+        "trusty_nvram_implementation.cpp",
+    ],
+
+    cflags: [
+        "-Wall",
+        "-Werror",
+        "-Wextra",
+        "-fvisibility=hidden",
+    ],
+    static_libs: ["libnvram-hal"],
+    shared_libs: [
+        "libtrusty",
+        "libnvram-messages",
+        "liblog",
+    ],
+}
diff --git a/trusty/nvram/Android.mk b/trusty/nvram/Android.mk
deleted file mode 100644
index 44e2212..0000000
--- a/trusty/nvram/Android.mk
+++ /dev/null
@@ -1,43 +0,0 @@
-#
-# Copyright (C) 2016 The Android Open-Source Project
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#      http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-#
-
-LOCAL_PATH := $(call my-dir)
-
-# nvram.trusty is the Trusty NVRAM HAL module.
-include $(CLEAR_VARS)
-LOCAL_MODULE := nvram.trusty
-LOCAL_MODULE_RELATIVE_PATH := hw
-LOCAL_SRC_FILES := \
-	module.c \
-	trusty_nvram_device.cpp \
-	trusty_nvram_implementation.cpp
-LOCAL_MODULE_TAGS := optional
-LOCAL_CFLAGS := -Wall -Werror -Wextra -fvisibility=hidden
-LOCAL_STATIC_LIBRARIES := libnvram-hal
-LOCAL_SHARED_LIBRARIES := libtrusty libnvram-messages liblog
-include $(BUILD_SHARED_LIBRARY)
-
-# nvram-wipe is a helper tool for clearing NVRAM state.
-include $(CLEAR_VARS)
-LOCAL_MODULE := nvram-wipe
-LOCAL_SRC_FILES := \
-	nvram_wipe.cpp \
-	trusty_nvram_implementation.cpp
-LOCAL_MODULE_TAGS := optional
-LOCAL_CFLAGS := -Wall -Werror -Wextra -fvisibility=hidden
-LOCAL_STATIC_LIBRARIES := libnvram-hal
-LOCAL_SHARED_LIBRARIES := libtrusty libnvram-messages liblog
-include $(BUILD_EXECUTABLE)