diff --git a/compatibility_matrices/Android.bp b/compatibility_matrices/Android.bp
index 6a3fa32..ad42015 100644
--- a/compatibility_matrices/Android.bp
+++ b/compatibility_matrices/Android.bp
@@ -93,14 +93,6 @@
 
 }
 
-// Device framework compatibility matrix (common to all FCM versions)
-// Reference: https://source.android.com/docs/core/architecture/vintf/comp-matrices
-vintf_compatibility_matrix {
-    name: "framework_compatibility_matrix.device.xml",
-    stem: "compatibility_matrix.device.xml",
-    type: "device_fcm",
-}
-
 // Phony target that installs all system compatibility matrix files
 SYSTEM_MATRIX_DEPS = [
     "framework_compatibility_matrix.5.xml",
@@ -122,26 +114,3 @@
         },
     },
 }
-
-// Product Compatibility Matrix
-vintf_compatibility_matrix {
-    name: "product_compatibility_matrix.xml",
-    stem: "compatibility_matrix.xml",
-    product_specific: true,
-    type: "product_fcm",
-}
-
-// Phony target that installs all framework compatibility matrix files (system + product)
-FRAMEWORK_MATRIX_DEPS = SYSTEM_MATRIX_DEPS + ["product_compatibility_matrix.xml"]
-
-phony {
-    name: "framework_compatibility_matrix.xml",
-    required: FRAMEWORK_MATRIX_DEPS,
-    product_variables: {
-        release_aidl_use_unfrozen: {
-            required: [
-                "framework_compatibility_matrix.202504.xml",
-            ],
-        },
-    },
-}
diff --git a/compatibility_matrices/Android.mk b/compatibility_matrices/Android.mk
new file mode 100644
index 0000000..338c075
--- /dev/null
+++ b/compatibility_matrices/Android.mk
@@ -0,0 +1,134 @@
+#
+# Copyright (C) 2017 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)
+
+BUILD_FRAMEWORK_COMPATIBILITY_MATRIX := $(LOCAL_PATH)/compatibility_matrix.mk
+my_empty_manifest := $(LOCAL_PATH)/manifest.empty.xml
+
+# System Compatibility Matrix (common to all FCM versions)
+
+include $(CLEAR_VARS)
+include $(LOCAL_PATH)/clear_vars.mk
+LOCAL_MODULE := framework_compatibility_matrix.device.xml
+LOCAL_LICENSE_KINDS := SPDX-license-identifier-Apache-2.0
+LOCAL_LICENSE_CONDITIONS := notice
+LOCAL_NOTICE_FILE := $(LOCAL_PATH)/../NOTICE
+LOCAL_MODULE_STEM := compatibility_matrix.device.xml
+# define LOCAL_MODULE_CLASS for local-generated-sources-dir.
+LOCAL_MODULE_CLASS := ETC
+LOCAL_MODULE_RELATIVE_PATH := vintf
+
+ifndef DEVICE_FRAMEWORK_COMPATIBILITY_MATRIX_FILE
+LOCAL_SRC_FILES := compatibility_matrix.empty.xml
+else
+
+# DEVICE_FRAMEWORK_COMPATIBILITY_MATRIX_FILE specifies absolute paths
+LOCAL_GENERATED_SOURCES := $(DEVICE_FRAMEWORK_COMPATIBILITY_MATRIX_FILE)
+
+# Enforce that DEVICE_FRAMEWORK_COMPATIBILITY_MATRIX_FILE does not specify required HALs
+# by checking it against an empty manifest. But the empty manifest needs to contain
+# BOARD_SEPOLICY_VERS to be compatible with DEVICE_FRAMEWORK_COMPATIBILITY_MATRIX_FILE.
+my_gen_check_manifest := $(local-generated-sources-dir)/manifest.check.xml
+$(my_gen_check_manifest): PRIVATE_SRC_FILE := $(my_empty_manifest)
+$(my_gen_check_manifest): $(my_empty_manifest) $(HOST_OUT_EXECUTABLES)/assemble_vintf
+	BOARD_SEPOLICY_VERS=$(BOARD_SEPOLICY_VERS) \
+	VINTF_IGNORE_TARGET_FCM_VERSION=true \
+		$(HOST_OUT_EXECUTABLES)/assemble_vintf -i $(PRIVATE_SRC_FILE) -o $@
+
+LOCAL_GEN_FILE_DEPENDENCIES += $(my_gen_check_manifest)
+LOCAL_ASSEMBLE_VINTF_FLAGS += -c "$(my_gen_check_manifest)"
+
+my_gen_check_manifest :=
+
+endif # DEVICE_FRAMEWORK_COMPATIBILITY_MATRIX_FILE
+
+# TODO(b/296875906): use POLICYVERS from Soong
+POLICYVERS ?= 30
+
+LOCAL_ADD_VBMETA_VERSION := true
+LOCAL_ASSEMBLE_VINTF_ENV_VARS := \
+    POLICYVERS \
+    PLATFORM_SEPOLICY_VERSION \
+    PLATFORM_SEPOLICY_COMPAT_VERSIONS
+
+include $(BUILD_FRAMEWORK_COMPATIBILITY_MATRIX)
+
+# Product Compatibility Matrix
+
+include $(CLEAR_VARS)
+include $(LOCAL_PATH)/clear_vars.mk
+LOCAL_MODULE := product_compatibility_matrix.xml
+LOCAL_LICENSE_KINDS := SPDX-license-identifier-Apache-2.0
+LOCAL_LICENSE_CONDITIONS := notice
+LOCAL_NOTICE_FILE := $(LOCAL_PATH)/../NOTICE
+
+ifndef DEVICE_PRODUCT_COMPATIBILITY_MATRIX_FILE
+my_framework_matrix_deps :=
+include $(BUILD_PHONY_PACKAGE)
+else # DEVICE_PRODUCT_COMPATIBILITY_MATRIX_FILE
+
+LOCAL_MODULE_STEM := compatibility_matrix.xml
+LOCAL_PRODUCT_MODULE := true
+LOCAL_MODULE_CLASS := ETC
+LOCAL_MODULE_RELATIVE_PATH := vintf
+
+# DEVICE_PRODUCT_COMPATIBILITY_MATRIX_FILE specifies absolute paths
+LOCAL_GENERATED_SOURCES := $(DEVICE_PRODUCT_COMPATIBILITY_MATRIX_FILE)
+
+# Enforce that DEVICE_PRODUCT_COMPATIBILITY_MATRIX_FILE does not specify required HALs
+# by checking it against an empty manifest.
+LOCAL_GEN_FILE_DEPENDENCIES += $(my_empty_manifest)
+LOCAL_ASSEMBLE_VINTF_FLAGS += -c "$(my_empty_manifest)"
+
+my_framework_matrix_deps := $(LOCAL_MODULE)
+
+include $(BUILD_FRAMEWORK_COMPATIBILITY_MATRIX)
+
+endif # DEVICE_PRODUCT_COMPATIBILITY_MATRIX_FILE
+
+my_system_matrix_deps := \
+    framework_compatibility_matrix.5.xml \
+    framework_compatibility_matrix.6.xml \
+    framework_compatibility_matrix.7.xml \
+    framework_compatibility_matrix.8.xml \
+    framework_compatibility_matrix.202404.xml \
+    framework_compatibility_matrix.device.xml \
+
+# Only allow the use of the unreleased compatibility matrix when we can use unfrozen
+# interfaces (in the `next` release configuration).
+ifeq ($(RELEASE_AIDL_USE_UNFROZEN),true)
+my_system_matrix_deps += \
+    framework_compatibility_matrix.202504.xml \
+
+endif
+
+my_framework_matrix_deps += \
+    $(my_system_matrix_deps)
+
+# Phony target that installs all framework compatibility matrix files (system + product)
+include $(CLEAR_VARS)
+LOCAL_MODULE := framework_compatibility_matrix.xml
+LOCAL_LICENSE_KINDS := SPDX-license-identifier-Apache-2.0
+LOCAL_LICENSE_CONDITIONS := notice
+LOCAL_NOTICE_FILE := $(LOCAL_PATH)/../NOTICE
+LOCAL_REQUIRED_MODULES := $(my_framework_matrix_deps)
+include $(BUILD_PHONY_PACKAGE)
+
+my_system_matrix_deps :=
+my_framework_matrix_deps :=
+my_empty_manifest :=
+BUILD_FRAMEWORK_COMPATIBILITY_MATRIX :=
diff --git a/compatibility_matrices/build/Android.bp b/compatibility_matrices/build/Android.bp
index 6011fcc..79ef36d 100644
--- a/compatibility_matrices/build/Android.bp
+++ b/compatibility_matrices/build/Android.bp
@@ -30,7 +30,6 @@
         "kernel-config-soong-rules",
         "soong",
         "soong-android",
-        "soong-selinux",
     ],
     srcs: [
         "vintf_compatibility_matrix.go",
diff --git a/compatibility_matrices/build/vintf_compatibility_matrix.go b/compatibility_matrices/build/vintf_compatibility_matrix.go
index b8f2a14..c72cbde 100644
--- a/compatibility_matrices/build/vintf_compatibility_matrix.go
+++ b/compatibility_matrices/build/vintf_compatibility_matrix.go
@@ -24,7 +24,6 @@
 
 	"android/soong/android"
 	"android/soong/kernel/configs"
-	"android/soong/selinux"
 )
 
 type dependencyTag struct {
@@ -36,10 +35,10 @@
 	pctx = android.NewPackageContext("android/vintf")
 
 	assembleVintfRule = pctx.AndroidStaticRule("assemble_vintf", blueprint.RuleParams{
-		Command:     `${assembleVintfEnv} ${assembleVintfCmd} -i ${inputs} -o ${out} ${extraArgs}`,
-		CommandDeps: []string{"${assembleVintfCmd}", "${AvbToolCmd}"},
+		Command:     `${assembleVintfCmd} -i ${inputs} -o ${out}`,
+		CommandDeps: []string{"${assembleVintfCmd}"},
 		Description: "assemble_vintf -i ${inputs}",
-	}, "inputs", "extraArgs", "assembleVintfEnv")
+	}, "inputs")
 
 	xmllintXsd = pctx.AndroidStaticRule("xmllint-xsd", blueprint.RuleParams{
 		Command:     `$XmlLintCmd --quiet --schema $xsd $in > /dev/null && touch -a $out`,
@@ -53,11 +52,7 @@
 )
 
 const (
-	relpath                  = "vintf"
-	emptyManifest            = "hardware/interfaces/compatibility_matrices/manifest.empty.xml"
-	compatibilityEmptyMatrix = "hardware/interfaces/compatibility_matrices/compatibility_matrix.empty.xml"
-	deviceFcmType            = "device_fcm"
-	productFcmType           = "product_fcm"
+	relpath = "vintf"
 )
 
 type vintfCompatibilityMatrixProperties struct {
@@ -69,9 +64,6 @@
 
 	// list of kernel_config modules to be combined to final output
 	Kernel_configs []string
-
-	// Type of the FCM type, the allowed type are device_fcm and product_fcm and it should only be used under hardware/interfaces/compatibility_matrices
-	Type *string
 }
 
 type vintfCompatibilityMatrixRule struct {
@@ -80,13 +72,11 @@
 
 	genFile                android.WritablePath
 	additionalDependencies android.WritablePaths
-	phonyOnly              bool
 }
 
 func init() {
 	pctx.HostBinToolVariable("assembleVintfCmd", "assemble_vintf")
 	pctx.HostBinToolVariable("XmlLintCmd", "xmllint")
-	pctx.HostBinToolVariable("AvbToolCmd", "avbtool")
 	android.RegisterModuleType("vintf_compatibility_matrix", vintfCompatibilityMatrixFactory)
 }
 
@@ -141,20 +131,6 @@
 }
 
 func (g *vintfCompatibilityMatrixRule) GenerateAndroidBuildActions(ctx android.ModuleContext) {
-	// Types attribute only allow `device_fcm` or `product_fcm` if set and only restricted it being used under
-	// `hardware/interfaces/compatibility_matrices` to prevent accidental external usages.
-	matrixType := proptools.String(g.properties.Type)
-	if matrixType != "" {
-		if matrixType != deviceFcmType && matrixType != productFcmType {
-			panic(fmt.Errorf("The attribute 'type' value must be either 'device_fcm' or 'product_fcm' if set!"))
-		}
-		if !strings.HasPrefix(android.PathForModuleSrc(ctx).String(), "hardware/interfaces/compatibility_matrices") {
-			panic(fmt.Errorf("Attribute type can only be set for module under `hardware/interfaces/compatibility_matrices`!"))
-		}
-		if (len(g.properties.Srcs) + len(g.properties.Kernel_configs)) > 0 {
-			panic(fmt.Errorf("Attribute 'type' and 'srcs' or 'kernel_configs' should not set simultaneously! To update inputs for this rule, edit vintf_compatibility_matrix.go directly."))
-		}
-	}
 
 	outputFilename := proptools.String(g.properties.Stem)
 	if outputFilename == "" {
@@ -182,72 +158,15 @@
 		}
 	})
 
-	// For product_compatibility_matrix.xml the source is from the product configuration
-	// DEVICE_PRODUCT_COMPATIBILITY_MATRIX_FILE.
-	extraArgs := []string{}
-	if matrixType == productFcmType {
-		productMatrixs := android.PathsForSource(ctx, ctx.Config().DeviceProductCompatibilityMatrixFile())
-		if len(productMatrixs) > 0 {
-			inputPaths = append(inputPaths, productMatrixs...)
-			extraArgs = append(extraArgs, "-c", android.PathForSource(ctx, emptyManifest).String())
-		} else {
-			// For product_fcm, if DEVICE_PRODUCT_COMPATIBILITY_MATRIX_FILE not set, treat it as a phony target without any output generated.
-			g.phonyOnly = true
-			return
-		}
-	}
-
-	// For framework_compatibility_matrix.device.xml the source may come from the product configuration
-	// DEVICE_FRAMEWORK_COMPATIBILITY_MATRIX_FILE or use compatibilityEmptyMatrix if not set. We can't
-	// use a phony target because we still need to install framework_compatibility_matrix.device.xml to
-	// include sepolicy versions.
-	frameworkRuleImplicits := []android.Path{}
-
-	if matrixType == deviceFcmType {
-		frameworkMatrixs := android.PathsForSource(ctx, ctx.Config().DeviceFrameworkCompatibilityMatrixFile())
-		if len(frameworkMatrixs) > 0 {
-			inputPaths = append(inputPaths, frameworkMatrixs...)
-
-			// Generate BuildAction for generating the check manifest.
-			emptyManifestPath := android.PathForSource(ctx, emptyManifest)
-			genCheckManifest := android.PathForModuleGen(ctx, "manifest.check.xml")
-			checkManifestInputs := []android.Path{emptyManifestPath}
-			genCheckManifestEnvs := []string{
-				"BOARD_SEPOLICY_VERS=" + ctx.DeviceConfig().BoardSepolicyVers(),
-				"VINTF_IGNORE_TARGET_FCM_VERSION=true",
-			}
-
-			ctx.Build(pctx, android.BuildParams{
-				Rule:        assembleVintfRule,
-				Description: "Framework Check Manifest",
-				Implicits:   checkManifestInputs,
-				Output:      genCheckManifest,
-				Args: map[string]string{
-					"inputs":           android.PathForSource(ctx, emptyManifest).String(),
-					"extraArgs":        "",
-					"assembleVintfEnv": strings.Join(genCheckManifestEnvs, " "),
-				},
-			})
-
-			frameworkRuleImplicits = append(frameworkRuleImplicits, genCheckManifest)
-			extraArgs = append(extraArgs, "-c", genCheckManifest.String())
-		} else {
-			inputPaths = append(inputPaths, android.PathForSource(ctx, compatibilityEmptyMatrix))
-		}
-	}
-
 	g.genFile = android.PathForModuleGen(ctx, outputFilename)
-	frameworkRuleImplicits = append(frameworkRuleImplicits, inputPaths...)
 
 	ctx.Build(pctx, android.BuildParams{
 		Rule:        assembleVintfRule,
 		Description: "Framework Compatibility Matrix",
-		Implicits:   frameworkRuleImplicits,
+		Implicits:   inputPaths,
 		Output:      g.genFile,
 		Args: map[string]string{
-			"inputs":           strings.Join(inputPaths.Strings(), ":"),
-			"extraArgs":        strings.Join(extraArgs, " "),
-			"assembleVintfEnv": g.getAssembleVintfEnv(ctx),
+			"inputs": strings.Join(inputPaths.Strings(), ":"),
 		},
 	})
 	g.generateValidateBuildAction(ctx, g.genFile, schema.Path())
@@ -255,39 +174,7 @@
 	ctx.InstallFile(android.PathForModuleInstall(ctx, "etc", relpath), outputFilename, g.genFile)
 }
 
-func (g *vintfCompatibilityMatrixRule) getAssembleVintfEnv(ctx android.ModuleContext) string {
-	if proptools.String(g.properties.Type) == deviceFcmType {
-		assembleVintfEnvs := []string{
-			// POLICYVERS defined in system/sepolicy/build/soong/policy.go
-			fmt.Sprintf("POLICYVERS=%d", selinux.PolicyVers),
-			fmt.Sprintf("PLATFORM_SEPOLICY_VERSION=%s", ctx.DeviceConfig().PlatformSepolicyVersion()),
-			fmt.Sprintf("PLATFORM_SEPOLICY_COMPAT_VERSIONS=\"%s\"", strings.Join(ctx.DeviceConfig().PlatformSepolicyCompatVersions(), " ")),
-		}
-
-		if ctx.Config().BoardAvbEnable() {
-			assembleVintfEnvs = append(assembleVintfEnvs, fmt.Sprintf("FRAMEWORK_VBMETA_VERSION=\"$$(${AvbToolCmd} add_hashtree_footer --print_required_libavb_version %s)\"", strings.Join(ctx.Config().BoardAvbSystemAddHashtreeFooterArgs(), " ")))
-		} else {
-			assembleVintfEnvs = append(assembleVintfEnvs, "FRAMEWORK_VBMETA_VERSION=\"0.0\"")
-		}
-
-		return strings.Join(assembleVintfEnvs, " ")
-	}
-
-	return ""
-}
-
 func (g *vintfCompatibilityMatrixRule) AndroidMk() android.AndroidMkData {
-	if g.phonyOnly {
-		return android.AndroidMkData{
-			Custom: func(w io.Writer, name, prefix, moduleDir string, data android.AndroidMkData) {
-				fmt.Fprintln(w, "\ninclude $(CLEAR_VARS)", " # vintf.vintf_compatibility_matrix")
-				fmt.Fprintln(w, "LOCAL_PATH :=", moduleDir)
-				fmt.Fprintln(w, "LOCAL_MODULE :=", name)
-				fmt.Fprintln(w, "include $(BUILD_PHONY_PACKAGE)")
-			},
-		}
-	}
-
 	return android.AndroidMkData{
 		Class:      "ETC",
 		OutputFile: android.OptionalPathForPath(g.genFile),
diff --git a/compatibility_matrices/compatibility_matrix.mk b/compatibility_matrices/compatibility_matrix.mk
new file mode 100644
index 0000000..64cd645
--- /dev/null
+++ b/compatibility_matrices/compatibility_matrix.mk
@@ -0,0 +1,94 @@
+#
+# Copyright (C) 2018 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.
+#
+
+##### Input Variables:
+# LOCAL_MODULE: required. Module name for the build system.
+# LOCAL_MODULE_CLASS: optional. Default is ETC.
+# LOCAL_MODULE_PATH / LOCAL_MODULE_RELATIVE_PATH: required. (Relative) path of output file.
+#       If not defined, LOCAL_MODULE_RELATIVE_PATH will be "vintf".
+# LOCAL_MODULE_STEM: optional. Name of output file. Default is $(LOCAL_MODULE).
+# LOCAL_SRC_FILES: required. Local source files provided to assemble_vintf
+#       (command line argument -i).
+# LOCAL_GENERATED_SOURCES: optional. Global source files provided to assemble_vintf
+#       (command line argument -i).
+#
+# LOCAL_ADD_VBMETA_VERSION: Use AVBTOOL to add avb version to the output matrix
+#       (corresponds to <avb><vbmeta-version> tag)
+# LOCAL_ASSEMBLE_VINTF_ENV_VARS: Add a list of environment variable names from global variables in
+#       the build system that is lazily evaluated (e.g. PRODUCT_ENFORCE_VINTF_MANIFEST).
+# LOCAL_ASSEMBLE_VINTF_FLAGS: Add additional command line arguments to assemble_vintf invocation.
+# LOCAL_GEN_FILE_DEPENDENCIES: A list of additional dependencies for the generated file.
+
+ifndef LOCAL_MODULE
+$(error LOCAL_MODULE must be defined.)
+endif
+
+ifndef LOCAL_MODULE_STEM
+LOCAL_MODULE_STEM := $(LOCAL_MODULE)
+endif
+
+ifndef LOCAL_MODULE_CLASS
+LOCAL_MODULE_CLASS := ETC
+endif
+
+ifndef LOCAL_MODULE_PATH
+ifndef LOCAL_MODULE_RELATIVE_PATH
+$(error Either LOCAL_MODULE_PATH or LOCAL_MODULE_RELATIVE_PATH must be defined.)
+endif
+endif
+
+GEN := $(local-generated-sources-dir)/$(LOCAL_MODULE_STEM)
+
+$(GEN): PRIVATE_ENV_VARS := $(LOCAL_ASSEMBLE_VINTF_ENV_VARS)
+$(GEN): PRIVATE_FLAGS := $(LOCAL_ASSEMBLE_VINTF_FLAGS)
+
+$(GEN): $(LOCAL_GEN_FILE_DEPENDENCIES)
+
+ifeq (true,$(strip $(LOCAL_ADD_VBMETA_VERSION)))
+ifeq (true,$(BOARD_AVB_ENABLE))
+$(GEN): $(AVBTOOL)
+$(GEN): $(BOARD_AVB_SYSTEM_KEY_PATH)
+# Use deferred assignment (=) instead of immediate assignment (:=).
+# Otherwise, cannot get INTERNAL_AVB_SYSTEM_SIGNING_ARGS.
+$(GEN): FRAMEWORK_VBMETA_VERSION = $$("$(AVBTOOL)" add_hashtree_footer \
+                           --print_required_libavb_version \
+                           $(BOARD_AVB_SYSTEM_ADD_HASHTREE_FOOTER_ARGS))
+else
+$(GEN): FRAMEWORK_VBMETA_VERSION := 0.0
+endif # BOARD_AVB_ENABLE
+$(GEN): PRIVATE_ENV_VARS += FRAMEWORK_VBMETA_VERSION
+endif # LOCAL_ADD_VBMETA_VERSION
+
+my_matrix_src_files := \
+	$(addprefix $(LOCAL_PATH)/,$(LOCAL_SRC_FILES)) \
+	$(LOCAL_GENERATED_SOURCES)
+
+$(GEN): PRIVATE_SRC_FILES := $(my_matrix_src_files)
+$(GEN): $(my_matrix_src_files) $(HOST_OUT_EXECUTABLES)/assemble_vintf
+	$(foreach varname,$(PRIVATE_ENV_VARS),$(varname)="$($(varname))") \
+		$(HOST_OUT_EXECUTABLES)/assemble_vintf \
+		-i $(call normalize-path-list,$(PRIVATE_SRC_FILES)) \
+		-o $@ \
+		$(PRIVATE_FLAGS)
+
+LOCAL_PREBUILT_MODULE_FILE := $(GEN)
+LOCAL_SRC_FILES :=
+LOCAL_GENERATED_SOURCES :=
+
+include $(LOCAL_PATH)/clear_vars.mk
+my_matrix_src_files :=
+
+include $(BUILD_PREBUILT)