diff --git a/tools/acp/Android.bp b/tools/acp/Android.bp
new file mode 100644
index 0000000..faf2034
--- /dev/null
+++ b/tools/acp/Android.bp
@@ -0,0 +1,13 @@
+// Copyright 2005 The Android Open Source Project
+//
+// Custom version of cp.
+
+cc_binary_host {
+
+    srcs: ["acp.c"],
+
+    static_libs: ["libhost"],
+    name: "acp",
+    stl: "none",
+
+}
diff --git a/tools/acp/Android.mk b/tools/acp/Android.mk
deleted file mode 100644
index 56aac14..0000000
--- a/tools/acp/Android.mk
+++ /dev/null
@@ -1,16 +0,0 @@
-# Copyright 2005 The Android Open Source Project
-#
-# Custom version of cp.
-
-LOCAL_PATH:= $(call my-dir)
-
-include $(CLEAR_VARS)
-
-LOCAL_SRC_FILES := \
-    acp.c
-
-LOCAL_STATIC_LIBRARIES := libhost
-LOCAL_MODULE := acp
-LOCAL_CXX_STL := none
-
-include $(BUILD_HOST_EXECUTABLE)
diff --git a/tools/ijar/Android.bp b/tools/ijar/Android.bp
new file mode 100644
index 0000000..f7e9a28
--- /dev/null
+++ b/tools/ijar/Android.bp
@@ -0,0 +1,20 @@
+// Copyright 2015 The Android Open Source Project
+//
+// The rest of files in this directory comes from
+// https://github.com/bazelbuild/bazel/tree/master/third_party/ijar
+
+cc_binary_host {
+    srcs: [
+        "classfile.cc",
+        "ijar.cc",
+        "zip.cc",
+    ],
+    cflags: [
+        "-Wall",
+        "-Werror",
+    ],
+    host_ldlibs: ["-lz"],
+    name: "ijar",
+    // libc++ is not supported for TARGET_BUILD_APPS builds
+    stl: "libstdc++",
+}
diff --git a/tools/ijar/Android.mk b/tools/ijar/Android.mk
deleted file mode 100644
index 8b2a02c..0000000
--- a/tools/ijar/Android.mk
+++ /dev/null
@@ -1,16 +0,0 @@
-# Copyright 2015 The Android Open Source Project
-#
-# The rest of files in this directory comes from
-# https://github.com/bazelbuild/bazel/tree/master/third_party/ijar
-
-LOCAL_PATH:= $(call my-dir)
-
-include $(CLEAR_VARS)
-LOCAL_CPP_EXTENSION := .cc
-LOCAL_SRC_FILES := classfile.cc ijar.cc zip.cc
-LOCAL_CFLAGS += -Wall -Werror
-LOCAL_SHARED_LIBRARIES := libz-host
-LOCAL_MODULE := ijar
-# libc++ is not supported for TARGET_BUILD_APPS builds
-LOCAL_CXX_STL := libstdc++
-include $(BUILD_HOST_EXECUTABLE)
diff --git a/tools/ziptime/Android.bp b/tools/ziptime/Android.bp
new file mode 100644
index 0000000..874d346
--- /dev/null
+++ b/tools/ziptime/Android.bp
@@ -0,0 +1,36 @@
+//
+// Copyright 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.
+//
+
+//
+// Zip timestamp removal tool
+//
+
+cc_binary_host {
+
+    srcs: [
+        "ZipTime.cpp",
+        "ZipEntry.cpp",
+        "ZipFile.cpp",
+    ],
+
+    name: "ziptime",
+    target: {
+        windows: {
+            enabled: true,
+        },
+    },
+
+}
diff --git a/tools/ziptime/Android.mk b/tools/ziptime/Android.mk
deleted file mode 100644
index 3575229..0000000
--- a/tools/ziptime/Android.mk
+++ /dev/null
@@ -1,32 +0,0 @@
-#
-# Copyright 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.
-#
-
-#
-# Zip timestamp removal tool
-#
-
-LOCAL_PATH:= $(call my-dir)
-include $(CLEAR_VARS)
-
-LOCAL_SRC_FILES := \
-	ZipTime.cpp \
-	ZipEntry.cpp \
-	ZipFile.cpp
-
-LOCAL_MODULE := ziptime
-LOCAL_MODULE_HOST_OS := darwin linux windows
-
-include $(BUILD_HOST_EXECUTABLE)