diff --git a/toolbox/Android.bp b/toolbox/Android.bp
index 9c2cafa..de8324a 100644
--- a/toolbox/Android.bp
+++ b/toolbox/Android.bp
@@ -1,11 +1,18 @@
-common_cflags = [
-    "-Werror",
-    "-Wno-unused-parameter",
-    "-Wno-unused-const-variable",
-    "-include bsd-compatibility.h"
-]
+cc_defaults {
+    name: "toolbox_defaults",
+
+    cflags: [
+        "-Werror",
+        "-Wno-unused-parameter",
+        "-Wno-unused-const-variable",
+        "-include bsd-compatibility.h",
+    ],
+    local_include_dirs: ["upstream-netbsd/include/"],
+}
 
 cc_library_static {
+    name: "libtoolbox_dd",
+    defaults: ["toolbox_defaults"],
     srcs: [
         "upstream-netbsd/bin/dd/args.c",
         "upstream-netbsd/bin/dd/conv.c",
@@ -19,17 +26,68 @@
         "upstream-netbsd/lib/libc/string/swab.c",
         "upstream-netbsd/lib/libutil/raise_default_signal.c",
     ],
-    cflags: common_cflags + [
+    cflags: [
         "-Dmain=dd_main",
         "-DNO_CONV",
     ],
-    local_include_dirs: ["upstream-netbsd/include/"],
-    name: "libtoolbox_dd",
+}
+
+genrule {
+    name: "toolbox_tools",
+    cmd: "echo '/* file generated automatically */' >$(out) && for t in toolbox dd getevent newfs_msdos getprop; do echo \"TOOL($$t)\" >>$(out); done",
+    out: ["tools.h"],
+}
+
+genrule {
+    name: "toolbox_input_labels",
+    tool_files: ["generate-input.h-labels.py"],
+    cmd: "$(location) $(in) >$(out)",
+    srcs: [":kernel_input_headers"],
+    out: ["input.h-labels.h"],
+}
+
+cc_binary {
+    name: "toolbox",
+    defaults: ["toolbox_defaults"],
+    srcs: [
+        "toolbox.c",
+        "getevent.c",
+        "getprop.cpp",
+        "newfs_msdos.c",
+    ],
+    generated_headers: [
+        "toolbox_tools",
+        "toolbox_input_labels",
+    ],
+    whole_static_libs: ["libtoolbox_dd"],
+    shared_libs: [
+        "libbase",
+        "libcutils",
+    ],
+    static_libs: [
+        "libpropertyinfoparser",
+    ],
+    cpp_std: "gnu++1z",
+
+    symlinks: [
+        "dd",
+        "getevent",
+        "getprop",
+        "newfs_msdos",
+    ],
+}
+
+// We only want 'r' on userdebug and eng builds.
+cc_binary {
+    name: "r",
+    defaults: ["toolbox_defaults"],
+    srcs: ["r.c"],
 }
 
 // We build BSD grep separately, so it can provide egrep and fgrep too.
 cc_defaults {
     name: "grep_common",
+    defaults: ["toolbox_defaults"],
     srcs: [
         "upstream-netbsd/usr.bin/grep/fastgrep.c",
         "upstream-netbsd/usr.bin/grep/file.c",
@@ -37,9 +95,10 @@
         "upstream-netbsd/usr.bin/grep/queue.c",
         "upstream-netbsd/usr.bin/grep/util.c",
     ],
-    cflags: common_cflags,
-    local_include_dirs: ["upstream-netbsd/include/"],
-    symlinks: ["egrep", "fgrep"],
+    symlinks: [
+        "egrep",
+        "fgrep",
+    ],
 
     sanitize: {
         integer_overflow: false,
diff --git a/toolbox/Android.mk b/toolbox/Android.mk
deleted file mode 100644
index d1b6114..0000000
--- a/toolbox/Android.mk
+++ /dev/null
@@ -1,78 +0,0 @@
-LOCAL_PATH:= $(call my-dir)
-
-common_cflags := \
-    -Werror -Wno-unused-parameter -Wno-unused-const-variable \
-    -include bsd-compatibility.h \
-
-include $(CLEAR_VARS)
-
-BSD_TOOLS := \
-    dd \
-
-OUR_TOOLS := \
-    getevent \
-    newfs_msdos \
-
-OUR_CPP_TOOLS := \
-    getprop \
-
-ALL_TOOLS = $(BSD_TOOLS) $(OUR_TOOLS) $(OUR_CPP_TOOLS)
-
-LOCAL_SRC_FILES := \
-    toolbox.c \
-    $(patsubst %,%.c,$(OUR_TOOLS)) \
-    $(patsubst %,%.cpp,$(OUR_CPP_TOOLS)) \
-
-LOCAL_CFLAGS += $(common_cflags)
-LOCAL_CPPFLAGS += -std=gnu++1z
-LOCAL_C_INCLUDES += $(LOCAL_PATH)/upstream-netbsd/include/
-
-LOCAL_SHARED_LIBRARIES := \
-    libbase \
-    libcutils \
-
-LOCAL_STATIC_LIBRARIES := libpropertyinfoparser
-
-LOCAL_WHOLE_STATIC_LIBRARIES := $(patsubst %,libtoolbox_%,$(BSD_TOOLS))
-
-LOCAL_MODULE := toolbox
-
-# Install the symlinks.
-LOCAL_POST_INSTALL_CMD := $(hide) $(foreach t,$(ALL_TOOLS),ln -sf toolbox $(TARGET_OUT)/bin/$(t);)
-
-# Including this will define $(intermediates).
-#
-include $(BUILD_EXECUTABLE)
-
-$(LOCAL_PATH)/toolbox.c: $(intermediates)/tools.h
-
-TOOLS_H := $(intermediates)/tools.h
-$(TOOLS_H): PRIVATE_TOOLS := toolbox $(ALL_TOOLS)
-$(TOOLS_H): PRIVATE_CUSTOM_TOOL = echo "/* file generated automatically */" > $@ ; for t in $(PRIVATE_TOOLS) ; do echo "TOOL($$t)" >> $@ ; done
-$(TOOLS_H): $(LOCAL_PATH)/Android.mk
-$(TOOLS_H):
-	$(transform-generated-source)
-
-$(LOCAL_PATH)/getevent.c: $(intermediates)/input.h-labels.h
-
-UAPI_INPUT_EVENT_CODES_H := bionic/libc/kernel/uapi/linux/input.h bionic/libc/kernel/uapi/linux/input-event-codes.h
-INPUT_H_LABELS_H := $(intermediates)/input.h-labels.h
-$(INPUT_H_LABELS_H): PRIVATE_LOCAL_PATH := $(LOCAL_PATH)
-# The PRIVATE_CUSTOM_TOOL line uses = to evaluate the output path late.
-# We copy the input path so it can't be accidentally modified later.
-$(INPUT_H_LABELS_H): PRIVATE_UAPI_INPUT_EVENT_CODES_H := $(UAPI_INPUT_EVENT_CODES_H)
-$(INPUT_H_LABELS_H): PRIVATE_CUSTOM_TOOL = $(PRIVATE_LOCAL_PATH)/generate-input.h-labels.py $(PRIVATE_UAPI_INPUT_EVENT_CODES_H) > $@
-# The dependency line though gets evaluated now, so the PRIVATE_ copy doesn't exist yet,
-# and the original can't yet have been modified, so this is both sufficient and necessary.
-$(INPUT_H_LABELS_H): $(LOCAL_PATH)/Android.mk $(LOCAL_PATH)/generate-input.h-labels.py $(UAPI_INPUT_EVENT_CODES_H)
-$(INPUT_H_LABELS_H):
-	$(transform-generated-source)
-
-# We only want 'r' on userdebug and eng builds.
-include $(CLEAR_VARS)
-LOCAL_SRC_FILES := r.c
-LOCAL_CFLAGS += $(common_cflags)
-LOCAL_C_INCLUDES += $(LOCAL_PATH)/upstream-netbsd/include/
-LOCAL_MODULE := r
-LOCAL_MODULE_TAGS := debug
-include $(BUILD_EXECUTABLE)