diff --git a/ui/metrics/metrics_proto/metrics.pb.go b/ui/metrics/metrics_proto/metrics.pb.go
index feefc89..5486ec1 100644
--- a/ui/metrics/metrics_proto/metrics.pb.go
+++ b/ui/metrics/metrics_proto/metrics.pb.go
@@ -1,11 +1,13 @@
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // source: metrics.proto
 
-package metrics_proto
+package soong_metrics_proto
 
-import proto "github.com/golang/protobuf/proto"
-import fmt "fmt"
-import math "math"
+import (
+	fmt "fmt"
+	proto "github.com/golang/protobuf/proto"
+	math "math"
+)
 
 // Reference imports to suppress errors if they are not otherwise used.
 var _ = proto.Marshal
@@ -16,65 +18,70 @@
 // is compatible with the proto package it is being compiled against.
 // A compilation error at this line likely means your copy of the
 // proto package needs to be updated.
-const _ = proto.ProtoPackageIsVersion2 // please upgrade the proto package
+const _ = proto.ProtoPackageIsVersion3 // please upgrade the proto package
 
-type MetricsBase_BUILDVARIANT int32
+type MetricsBase_BuildVariant int32
 
 const (
-	MetricsBase_USER      MetricsBase_BUILDVARIANT = 0
-	MetricsBase_USERDEBUG MetricsBase_BUILDVARIANT = 1
-	MetricsBase_ENG       MetricsBase_BUILDVARIANT = 2
+	MetricsBase_USER      MetricsBase_BuildVariant = 0
+	MetricsBase_USERDEBUG MetricsBase_BuildVariant = 1
+	MetricsBase_ENG       MetricsBase_BuildVariant = 2
 )
 
-var MetricsBase_BUILDVARIANT_name = map[int32]string{
+var MetricsBase_BuildVariant_name = map[int32]string{
 	0: "USER",
 	1: "USERDEBUG",
 	2: "ENG",
 }
-var MetricsBase_BUILDVARIANT_value = map[string]int32{
+
+var MetricsBase_BuildVariant_value = map[string]int32{
 	"USER":      0,
 	"USERDEBUG": 1,
 	"ENG":       2,
 }
 
-func (x MetricsBase_BUILDVARIANT) Enum() *MetricsBase_BUILDVARIANT {
-	p := new(MetricsBase_BUILDVARIANT)
+func (x MetricsBase_BuildVariant) Enum() *MetricsBase_BuildVariant {
+	p := new(MetricsBase_BuildVariant)
 	*p = x
 	return p
 }
-func (x MetricsBase_BUILDVARIANT) String() string {
-	return proto.EnumName(MetricsBase_BUILDVARIANT_name, int32(x))
+
+func (x MetricsBase_BuildVariant) String() string {
+	return proto.EnumName(MetricsBase_BuildVariant_name, int32(x))
 }
-func (x *MetricsBase_BUILDVARIANT) UnmarshalJSON(data []byte) error {
-	value, err := proto.UnmarshalJSONEnum(MetricsBase_BUILDVARIANT_value, data, "MetricsBase_BUILDVARIANT")
+
+func (x *MetricsBase_BuildVariant) UnmarshalJSON(data []byte) error {
+	value, err := proto.UnmarshalJSONEnum(MetricsBase_BuildVariant_value, data, "MetricsBase_BuildVariant")
 	if err != nil {
 		return err
 	}
-	*x = MetricsBase_BUILDVARIANT(value)
+	*x = MetricsBase_BuildVariant(value)
 	return nil
 }
-func (MetricsBase_BUILDVARIANT) EnumDescriptor() ([]byte, []int) {
-	return fileDescriptor_metrics_9e7b895801991242, []int{0, 0}
+
+func (MetricsBase_BuildVariant) EnumDescriptor() ([]byte, []int) {
+	return fileDescriptor_6039342a2ba47b72, []int{0, 0}
 }
 
-type MetricsBase_ARCH int32
+type MetricsBase_Arch int32
 
 const (
-	MetricsBase_UNKNOWN MetricsBase_ARCH = 0
-	MetricsBase_ARM     MetricsBase_ARCH = 1
-	MetricsBase_ARM64   MetricsBase_ARCH = 2
-	MetricsBase_X86     MetricsBase_ARCH = 3
-	MetricsBase_X86_64  MetricsBase_ARCH = 4
+	MetricsBase_UNKNOWN MetricsBase_Arch = 0
+	MetricsBase_ARM     MetricsBase_Arch = 1
+	MetricsBase_ARM64   MetricsBase_Arch = 2
+	MetricsBase_X86     MetricsBase_Arch = 3
+	MetricsBase_X86_64  MetricsBase_Arch = 4
 )
 
-var MetricsBase_ARCH_name = map[int32]string{
+var MetricsBase_Arch_name = map[int32]string{
 	0: "UNKNOWN",
 	1: "ARM",
 	2: "ARM64",
 	3: "X86",
 	4: "X86_64",
 }
-var MetricsBase_ARCH_value = map[string]int32{
+
+var MetricsBase_Arch_value = map[string]int32{
 	"UNKNOWN": 0,
 	"ARM":     1,
 	"ARM64":   2,
@@ -82,63 +89,70 @@
 	"X86_64":  4,
 }
 
-func (x MetricsBase_ARCH) Enum() *MetricsBase_ARCH {
-	p := new(MetricsBase_ARCH)
+func (x MetricsBase_Arch) Enum() *MetricsBase_Arch {
+	p := new(MetricsBase_Arch)
 	*p = x
 	return p
 }
-func (x MetricsBase_ARCH) String() string {
-	return proto.EnumName(MetricsBase_ARCH_name, int32(x))
+
+func (x MetricsBase_Arch) String() string {
+	return proto.EnumName(MetricsBase_Arch_name, int32(x))
 }
-func (x *MetricsBase_ARCH) UnmarshalJSON(data []byte) error {
-	value, err := proto.UnmarshalJSONEnum(MetricsBase_ARCH_value, data, "MetricsBase_ARCH")
+
+func (x *MetricsBase_Arch) UnmarshalJSON(data []byte) error {
+	value, err := proto.UnmarshalJSONEnum(MetricsBase_Arch_value, data, "MetricsBase_Arch")
 	if err != nil {
 		return err
 	}
-	*x = MetricsBase_ARCH(value)
+	*x = MetricsBase_Arch(value)
 	return nil
 }
-func (MetricsBase_ARCH) EnumDescriptor() ([]byte, []int) {
-	return fileDescriptor_metrics_9e7b895801991242, []int{0, 1}
+
+func (MetricsBase_Arch) EnumDescriptor() ([]byte, []int) {
+	return fileDescriptor_6039342a2ba47b72, []int{0, 1}
 }
 
-type ModuleTypeInfo_BUILDSYSTEM int32
+type ModuleTypeInfo_BuildSystem int32
 
 const (
-	ModuleTypeInfo_UNKNOWN ModuleTypeInfo_BUILDSYSTEM = 0
-	ModuleTypeInfo_SOONG   ModuleTypeInfo_BUILDSYSTEM = 1
-	ModuleTypeInfo_MAKE    ModuleTypeInfo_BUILDSYSTEM = 2
+	ModuleTypeInfo_UNKNOWN ModuleTypeInfo_BuildSystem = 0
+	ModuleTypeInfo_SOONG   ModuleTypeInfo_BuildSystem = 1
+	ModuleTypeInfo_MAKE    ModuleTypeInfo_BuildSystem = 2
 )
 
-var ModuleTypeInfo_BUILDSYSTEM_name = map[int32]string{
+var ModuleTypeInfo_BuildSystem_name = map[int32]string{
 	0: "UNKNOWN",
 	1: "SOONG",
 	2: "MAKE",
 }
-var ModuleTypeInfo_BUILDSYSTEM_value = map[string]int32{
+
+var ModuleTypeInfo_BuildSystem_value = map[string]int32{
 	"UNKNOWN": 0,
 	"SOONG":   1,
 	"MAKE":    2,
 }
 
-func (x ModuleTypeInfo_BUILDSYSTEM) Enum() *ModuleTypeInfo_BUILDSYSTEM {
-	p := new(ModuleTypeInfo_BUILDSYSTEM)
+func (x ModuleTypeInfo_BuildSystem) Enum() *ModuleTypeInfo_BuildSystem {
+	p := new(ModuleTypeInfo_BuildSystem)
 	*p = x
 	return p
 }
-func (x ModuleTypeInfo_BUILDSYSTEM) String() string {
-	return proto.EnumName(ModuleTypeInfo_BUILDSYSTEM_name, int32(x))
+
+func (x ModuleTypeInfo_BuildSystem) String() string {
+	return proto.EnumName(ModuleTypeInfo_BuildSystem_name, int32(x))
 }
-func (x *ModuleTypeInfo_BUILDSYSTEM) UnmarshalJSON(data []byte) error {
-	value, err := proto.UnmarshalJSONEnum(ModuleTypeInfo_BUILDSYSTEM_value, data, "ModuleTypeInfo_BUILDSYSTEM")
+
+func (x *ModuleTypeInfo_BuildSystem) UnmarshalJSON(data []byte) error {
+	value, err := proto.UnmarshalJSONEnum(ModuleTypeInfo_BuildSystem_value, data, "ModuleTypeInfo_BuildSystem")
 	if err != nil {
 		return err
 	}
-	*x = ModuleTypeInfo_BUILDSYSTEM(value)
+	*x = ModuleTypeInfo_BuildSystem(value)
 	return nil
 }
-func (ModuleTypeInfo_BUILDSYSTEM) EnumDescriptor() ([]byte, []int) {
-	return fileDescriptor_metrics_9e7b895801991242, []int{2, 0}
+
+func (ModuleTypeInfo_BuildSystem) EnumDescriptor() ([]byte, []int) {
+	return fileDescriptor_6039342a2ba47b72, []int{2, 0}
 }
 
 type MetricsBase struct {
@@ -151,17 +165,17 @@
 	// The target product information, eg. aosp_arm.
 	TargetProduct *string `protobuf:"bytes,4,opt,name=target_product,json=targetProduct" json:"target_product,omitempty"`
 	// The target build variant information, eg. eng.
-	TargetBuildVariant *MetricsBase_BUILDVARIANT `protobuf:"varint,5,opt,name=target_build_variant,json=targetBuildVariant,enum=build_metrics.MetricsBase_BUILDVARIANT,def=2" json:"target_build_variant,omitempty"`
+	TargetBuildVariant *MetricsBase_BuildVariant `protobuf:"varint,5,opt,name=target_build_variant,json=targetBuildVariant,enum=soong_build_metrics.MetricsBase_BuildVariant,def=2" json:"target_build_variant,omitempty"`
 	// The target arch information, eg. arm.
-	TargetArch *MetricsBase_ARCH `protobuf:"varint,6,opt,name=target_arch,json=targetArch,enum=build_metrics.MetricsBase_ARCH,def=0" json:"target_arch,omitempty"`
+	TargetArch *MetricsBase_Arch `protobuf:"varint,6,opt,name=target_arch,json=targetArch,enum=soong_build_metrics.MetricsBase_Arch,def=0" json:"target_arch,omitempty"`
 	// The target arch variant information, eg. armv7-a-neon.
 	TargetArchVariant *string `protobuf:"bytes,7,opt,name=target_arch_variant,json=targetArchVariant" json:"target_arch_variant,omitempty"`
 	// The target cpu variant information, eg. generic.
 	TargetCpuVariant *string `protobuf:"bytes,8,opt,name=target_cpu_variant,json=targetCpuVariant" json:"target_cpu_variant,omitempty"`
 	// The host arch information, eg. x86_64.
-	HostArch *MetricsBase_ARCH `protobuf:"varint,9,opt,name=host_arch,json=hostArch,enum=build_metrics.MetricsBase_ARCH,def=0" json:"host_arch,omitempty"`
+	HostArch *MetricsBase_Arch `protobuf:"varint,9,opt,name=host_arch,json=hostArch,enum=soong_build_metrics.MetricsBase_Arch,def=0" json:"host_arch,omitempty"`
 	// The host 2nd arch information, eg. x86.
-	Host_2NdArch *MetricsBase_ARCH `protobuf:"varint,10,opt,name=host_2nd_arch,json=host2ndArch,enum=build_metrics.MetricsBase_ARCH,def=0" json:"host_2nd_arch,omitempty"`
+	Host_2NdArch *MetricsBase_Arch `protobuf:"varint,10,opt,name=host_2nd_arch,json=host2ndArch,enum=soong_build_metrics.MetricsBase_Arch,def=0" json:"host_2nd_arch,omitempty"`
 	// The host os information, eg. linux.
 	HostOs *string `protobuf:"bytes,11,opt,name=host_os,json=hostOs" json:"host_os,omitempty"`
 	// The host os extra information, eg. Linux-4.17.0-3rodete2-amd64-x86_64-Debian-GNU.
@@ -191,16 +205,17 @@
 func (m *MetricsBase) String() string { return proto.CompactTextString(m) }
 func (*MetricsBase) ProtoMessage()    {}
 func (*MetricsBase) Descriptor() ([]byte, []int) {
-	return fileDescriptor_metrics_9e7b895801991242, []int{0}
+	return fileDescriptor_6039342a2ba47b72, []int{0}
 }
+
 func (m *MetricsBase) XXX_Unmarshal(b []byte) error {
 	return xxx_messageInfo_MetricsBase.Unmarshal(m, b)
 }
 func (m *MetricsBase) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
 	return xxx_messageInfo_MetricsBase.Marshal(b, m, deterministic)
 }
-func (dst *MetricsBase) XXX_Merge(src proto.Message) {
-	xxx_messageInfo_MetricsBase.Merge(dst, src)
+func (m *MetricsBase) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_MetricsBase.Merge(m, src)
 }
 func (m *MetricsBase) XXX_Size() int {
 	return xxx_messageInfo_MetricsBase.Size(m)
@@ -211,10 +226,10 @@
 
 var xxx_messageInfo_MetricsBase proto.InternalMessageInfo
 
-const Default_MetricsBase_TargetBuildVariant MetricsBase_BUILDVARIANT = MetricsBase_ENG
-const Default_MetricsBase_TargetArch MetricsBase_ARCH = MetricsBase_UNKNOWN
-const Default_MetricsBase_HostArch MetricsBase_ARCH = MetricsBase_UNKNOWN
-const Default_MetricsBase_Host_2NdArch MetricsBase_ARCH = MetricsBase_UNKNOWN
+const Default_MetricsBase_TargetBuildVariant MetricsBase_BuildVariant = MetricsBase_ENG
+const Default_MetricsBase_TargetArch MetricsBase_Arch = MetricsBase_UNKNOWN
+const Default_MetricsBase_HostArch MetricsBase_Arch = MetricsBase_UNKNOWN
+const Default_MetricsBase_Host_2NdArch MetricsBase_Arch = MetricsBase_UNKNOWN
 
 func (m *MetricsBase) GetBuildDateTimestamp() int64 {
 	if m != nil && m.BuildDateTimestamp != nil {
@@ -244,14 +259,14 @@
 	return ""
 }
 
-func (m *MetricsBase) GetTargetBuildVariant() MetricsBase_BUILDVARIANT {
+func (m *MetricsBase) GetTargetBuildVariant() MetricsBase_BuildVariant {
 	if m != nil && m.TargetBuildVariant != nil {
 		return *m.TargetBuildVariant
 	}
 	return Default_MetricsBase_TargetBuildVariant
 }
 
-func (m *MetricsBase) GetTargetArch() MetricsBase_ARCH {
+func (m *MetricsBase) GetTargetArch() MetricsBase_Arch {
 	if m != nil && m.TargetArch != nil {
 		return *m.TargetArch
 	}
@@ -272,14 +287,14 @@
 	return ""
 }
 
-func (m *MetricsBase) GetHostArch() MetricsBase_ARCH {
+func (m *MetricsBase) GetHostArch() MetricsBase_Arch {
 	if m != nil && m.HostArch != nil {
 		return *m.HostArch
 	}
 	return Default_MetricsBase_HostArch
 }
 
-func (m *MetricsBase) GetHost_2NdArch() MetricsBase_ARCH {
+func (m *MetricsBase) GetHost_2NdArch() MetricsBase_Arch {
 	if m != nil && m.Host_2NdArch != nil {
 		return *m.Host_2NdArch
 	}
@@ -378,16 +393,17 @@
 func (m *PerfInfo) String() string { return proto.CompactTextString(m) }
 func (*PerfInfo) ProtoMessage()    {}
 func (*PerfInfo) Descriptor() ([]byte, []int) {
-	return fileDescriptor_metrics_9e7b895801991242, []int{1}
+	return fileDescriptor_6039342a2ba47b72, []int{1}
 }
+
 func (m *PerfInfo) XXX_Unmarshal(b []byte) error {
 	return xxx_messageInfo_PerfInfo.Unmarshal(m, b)
 }
 func (m *PerfInfo) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
 	return xxx_messageInfo_PerfInfo.Marshal(b, m, deterministic)
 }
-func (dst *PerfInfo) XXX_Merge(src proto.Message) {
-	xxx_messageInfo_PerfInfo.Merge(dst, src)
+func (m *PerfInfo) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_PerfInfo.Merge(m, src)
 }
 func (m *PerfInfo) XXX_Size() int {
 	return xxx_messageInfo_PerfInfo.Size(m)
@@ -435,7 +451,7 @@
 
 type ModuleTypeInfo struct {
 	// The build system, eg. Soong or Make.
-	BuildSystem *ModuleTypeInfo_BUILDSYSTEM `protobuf:"varint,1,opt,name=build_system,json=buildSystem,enum=build_metrics.ModuleTypeInfo_BUILDSYSTEM,def=0" json:"build_system,omitempty"`
+	BuildSystem *ModuleTypeInfo_BuildSystem `protobuf:"varint,1,opt,name=build_system,json=buildSystem,enum=soong_build_metrics.ModuleTypeInfo_BuildSystem,def=0" json:"build_system,omitempty"`
 	// The module type, eg. java_library, cc_binary, and etc.
 	ModuleType *string `protobuf:"bytes,2,opt,name=module_type,json=moduleType" json:"module_type,omitempty"`
 	// The number of logical modules.
@@ -449,16 +465,17 @@
 func (m *ModuleTypeInfo) String() string { return proto.CompactTextString(m) }
 func (*ModuleTypeInfo) ProtoMessage()    {}
 func (*ModuleTypeInfo) Descriptor() ([]byte, []int) {
-	return fileDescriptor_metrics_9e7b895801991242, []int{2}
+	return fileDescriptor_6039342a2ba47b72, []int{2}
 }
+
 func (m *ModuleTypeInfo) XXX_Unmarshal(b []byte) error {
 	return xxx_messageInfo_ModuleTypeInfo.Unmarshal(m, b)
 }
 func (m *ModuleTypeInfo) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
 	return xxx_messageInfo_ModuleTypeInfo.Marshal(b, m, deterministic)
 }
-func (dst *ModuleTypeInfo) XXX_Merge(src proto.Message) {
-	xxx_messageInfo_ModuleTypeInfo.Merge(dst, src)
+func (m *ModuleTypeInfo) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_ModuleTypeInfo.Merge(m, src)
 }
 func (m *ModuleTypeInfo) XXX_Size() int {
 	return xxx_messageInfo_ModuleTypeInfo.Size(m)
@@ -469,9 +486,9 @@
 
 var xxx_messageInfo_ModuleTypeInfo proto.InternalMessageInfo
 
-const Default_ModuleTypeInfo_BuildSystem ModuleTypeInfo_BUILDSYSTEM = ModuleTypeInfo_UNKNOWN
+const Default_ModuleTypeInfo_BuildSystem ModuleTypeInfo_BuildSystem = ModuleTypeInfo_UNKNOWN
 
-func (m *ModuleTypeInfo) GetBuildSystem() ModuleTypeInfo_BUILDSYSTEM {
+func (m *ModuleTypeInfo) GetBuildSystem() ModuleTypeInfo_BuildSystem {
 	if m != nil && m.BuildSystem != nil {
 		return *m.BuildSystem
 	}
@@ -493,65 +510,65 @@
 }
 
 func init() {
-	proto.RegisterType((*MetricsBase)(nil), "build_metrics.MetricsBase")
-	proto.RegisterType((*PerfInfo)(nil), "build_metrics.PerfInfo")
-	proto.RegisterType((*ModuleTypeInfo)(nil), "build_metrics.ModuleTypeInfo")
-	proto.RegisterEnum("build_metrics.MetricsBase_BUILDVARIANT", MetricsBase_BUILDVARIANT_name, MetricsBase_BUILDVARIANT_value)
-	proto.RegisterEnum("build_metrics.MetricsBase_ARCH", MetricsBase_ARCH_name, MetricsBase_ARCH_value)
-	proto.RegisterEnum("build_metrics.ModuleTypeInfo_BUILDSYSTEM", ModuleTypeInfo_BUILDSYSTEM_name, ModuleTypeInfo_BUILDSYSTEM_value)
+	proto.RegisterEnum("soong_build_metrics.MetricsBase_BuildVariant", MetricsBase_BuildVariant_name, MetricsBase_BuildVariant_value)
+	proto.RegisterEnum("soong_build_metrics.MetricsBase_Arch", MetricsBase_Arch_name, MetricsBase_Arch_value)
+	proto.RegisterEnum("soong_build_metrics.ModuleTypeInfo_BuildSystem", ModuleTypeInfo_BuildSystem_name, ModuleTypeInfo_BuildSystem_value)
+	proto.RegisterType((*MetricsBase)(nil), "soong_build_metrics.MetricsBase")
+	proto.RegisterType((*PerfInfo)(nil), "soong_build_metrics.PerfInfo")
+	proto.RegisterType((*ModuleTypeInfo)(nil), "soong_build_metrics.ModuleTypeInfo")
 }
 
-func init() { proto.RegisterFile("metrics.proto", fileDescriptor_metrics_9e7b895801991242) }
+func init() { proto.RegisterFile("metrics.proto", fileDescriptor_6039342a2ba47b72) }
 
-var fileDescriptor_metrics_9e7b895801991242 = []byte{
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+var fileDescriptor_6039342a2ba47b72 = []byte{
+	// 769 bytes of a gzipped FileDescriptorProto
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+	0x00,
 }
diff --git a/ui/metrics/metrics_proto/metrics.proto b/ui/metrics/metrics_proto/metrics.proto
index b3de2f4..93034eb 100644
--- a/ui/metrics/metrics_proto/metrics.proto
+++ b/ui/metrics/metrics_proto/metrics.proto
@@ -14,10 +14,8 @@
 
 syntax = "proto2";
 
-option optimize_for = LITE_RUNTIME;
-
-package build_metrics;
-option go_package = "metrics_proto";
+package soong_build_metrics;
+option go_package = "soong_metrics_proto";
 
 message MetricsBase {
   // Timestamp generated when the build starts.
@@ -32,15 +30,15 @@
   // The target product information, eg. aosp_arm.
   optional string target_product = 4;
 
-  enum BUILDVARIANT {
+  enum BuildVariant {
     USER = 0;
     USERDEBUG = 1;
     ENG = 2;
   }
   // The target build variant information, eg. eng.
-  optional BUILDVARIANT target_build_variant = 5 [default = ENG];
+  optional BuildVariant target_build_variant = 5 [default = ENG];
 
-  enum ARCH {
+  enum Arch {
     UNKNOWN = 0;
     ARM = 1;
     ARM64 = 2;
@@ -48,7 +46,7 @@
     X86_64 = 4;
   }
   // The target arch information, eg. arm.
-  optional ARCH target_arch = 6 [default = UNKNOWN];
+  optional Arch target_arch = 6 [default = UNKNOWN];
 
   // The target arch variant information, eg. armv7-a-neon.
   optional string target_arch_variant = 7;
@@ -57,10 +55,10 @@
   optional string target_cpu_variant = 8;
 
   // The host arch information, eg. x86_64.
-  optional ARCH host_arch = 9 [default = UNKNOWN];
+  optional Arch host_arch = 9 [default = UNKNOWN];
 
   // The host 2nd arch information, eg. x86.
-  optional ARCH host_2nd_arch = 10 [default = UNKNOWN];
+  optional Arch host_2nd_arch = 10 [default = UNKNOWN];
 
   // The host os information, eg. linux.
   optional string host_os = 11;
@@ -113,13 +111,13 @@
 }
 
 message ModuleTypeInfo {
-  enum BUILDSYSTEM {
+  enum BuildSystem {
     UNKNOWN = 0;
     SOONG = 1;
     MAKE = 2;
   }
   // The build system, eg. Soong or Make.
-  optional BUILDSYSTEM build_system = 1 [default = UNKNOWN];
+  optional BuildSystem build_system = 1 [default = UNKNOWN];
 
   // The module type, eg. java_library, cc_binary, and etc.
   optional string module_type = 2;