diff --git a/cmd/buildctl/build.go b/cmd/buildctl/build.go
index 716ab1f3..003d6186 100644
--- a/cmd/buildctl/build.go
+++ b/cmd/buildctl/build.go
@@ -18,6 +18,7 @@ import (
 	"github.com/moby/buildkit/solver/errdefs"
 	"github.com/moby/buildkit/solver/pb"
 	"github.com/moby/buildkit/util/progress/progressui"
+	"github.com/moby/buildkit/util/stack"
 	"github.com/opencontainers/go-digest"
 	"github.com/pkg/errors"
 	"github.com/sirupsen/logrus"
@@ -298,7 +299,7 @@ func buildAction(clicontext *cli.Context) error {
 
 	// temp test
 	if os.Getenv("BUILDCTL_DEBUG_ERROR_UNSTABLE") == "1" {
-		log.Printf("%+v", errdefs.StackFormatter(err))
+		log.Printf("%+v", stack.Formatter(err))
 
 		var ve *errdefs.VertexError
 		if errors.As(err, &ve) {
diff --git a/cmd/buildctl/main.go b/cmd/buildctl/main.go
index bd6b9ac5..aaaf694c 100644
--- a/cmd/buildctl/main.go
+++ b/cmd/buildctl/main.go
@@ -7,10 +7,10 @@ import (
 	_ "github.com/moby/buildkit/client/connhelper/dockercontainer"
 	_ "github.com/moby/buildkit/client/connhelper/kubepod"
 	bccommon "github.com/moby/buildkit/cmd/buildctl/common"
-	"github.com/moby/buildkit/solver/errdefs"
 	"github.com/moby/buildkit/util/apicaps"
 	"github.com/moby/buildkit/util/appdefaults"
 	"github.com/moby/buildkit/util/profiler"
+	"github.com/moby/buildkit/util/stack"
 	"github.com/moby/buildkit/version"
 	"github.com/sirupsen/logrus"
 	"github.com/urfave/cli"
@@ -19,7 +19,7 @@ import (
 func init() {
 	apicaps.ExportedProduct = "buildkit"
 
-	errdefs.SetVersionInfo(version.Version, version.Revision)
+	stack.SetVersionInfo(version.Version, version.Revision)
 }
 
 func main() {
diff --git a/cmd/buildkitd/main.go b/cmd/buildkitd/main.go
index 7d6fa4ef..0d28d24a 100644
--- a/cmd/buildkitd/main.go
+++ b/cmd/buildkitd/main.go
@@ -40,7 +40,6 @@ import (
 	"github.com/moby/buildkit/frontend/gateway/forwarder"
 	"github.com/moby/buildkit/session"
 	"github.com/moby/buildkit/solver/bboltcachestorage"
-	"github.com/moby/buildkit/solver/errdefs"
 	"github.com/moby/buildkit/util/apicaps"
 	"github.com/moby/buildkit/util/appcontext"
 	"github.com/moby/buildkit/util/appdefaults"
@@ -48,6 +47,7 @@ import (
 	"github.com/moby/buildkit/util/grpcerrors"
 	"github.com/moby/buildkit/util/profiler"
 	"github.com/moby/buildkit/util/resolver"
+	"github.com/moby/buildkit/util/stack"
 	"github.com/moby/buildkit/version"
 	"github.com/moby/buildkit/worker"
 	specs "github.com/opencontainers/image-spec/specs-go/v1"
@@ -61,7 +61,7 @@ import (
 
 func init() {
 	apicaps.ExportedProduct = "buildkit"
-	errdefs.SetVersionInfo(version.Version, version.Revision)
+	stack.SetVersionInfo(version.Version, version.Revision)
 
 	seed.WithTimeAndRand()
 	reexec.Init()
diff --git a/executor/runcexecutor/executor.go b/executor/runcexecutor/executor.go
index 26e432e6..dc16c8f0 100644
--- a/executor/runcexecutor/executor.go
+++ b/executor/runcexecutor/executor.go
@@ -23,6 +23,7 @@ import (
 	"github.com/moby/buildkit/solver/pb"
 	"github.com/moby/buildkit/util/network"
 	rootlessspecconv "github.com/moby/buildkit/util/rootless/specconv"
+	"github.com/moby/buildkit/util/stack"
 	"github.com/pkg/errors"
 	"github.com/sirupsen/logrus"
 )
@@ -302,7 +303,7 @@ func (w *runcExecutor) Exec(ctx context.Context, meta executor.Meta, root cache.
 		case <-ctx.Done():
 			return errors.Wrapf(ctx.Err(), err.Error())
 		default:
-			return err
+			return stack.Enable(err)
 		}
 	}
 
diff --git a/frontend/dockerfile/cmd/dockerfile-frontend/main.go b/frontend/dockerfile/cmd/dockerfile-frontend/main.go
index 641f6b2f..4e2dc6dd 100644
--- a/frontend/dockerfile/cmd/dockerfile-frontend/main.go
+++ b/frontend/dockerfile/cmd/dockerfile-frontend/main.go
@@ -7,13 +7,13 @@ import (
 
 	dockerfile "github.com/moby/buildkit/frontend/dockerfile/builder"
 	"github.com/moby/buildkit/frontend/gateway/grpcclient"
-	"github.com/moby/buildkit/solver/errdefs"
 	"github.com/moby/buildkit/util/appcontext"
+	"github.com/moby/buildkit/util/stack"
 	"github.com/sirupsen/logrus"
 )
 
 func init() {
-	errdefs.SetVersionInfo(Version, Revision)
+	stack.SetVersionInfo(Version, Revision)
 }
 
 func main() {
diff --git a/frontend/dockerfile/parser/errors.go b/frontend/dockerfile/parser/errors.go
index 206448b9..9f28a5a2 100644
--- a/frontend/dockerfile/parser/errors.go
+++ b/frontend/dockerfile/parser/errors.go
@@ -1,6 +1,9 @@
 package parser
 
-import "github.com/pkg/errors"
+import (
+	"github.com/moby/buildkit/util/stack"
+	"github.com/pkg/errors"
+)
 
 // ErrorLocation gives a location in source code that caused the error
 type ErrorLocation struct {
@@ -38,14 +41,10 @@ func WithLocation(err error, location []Range) error {
 	if errors.As(err, &el) {
 		return err
 	}
-	var err1 error = &ErrorLocation{
+	return stack.Enable(&ErrorLocation{
 		error:    err,
 		Location: location,
-	}
-	if !hasLocalStackTrace(err) {
-		err1 = errors.WithStack(err1)
-	}
-	return err1
+	})
 }
 
 func toRanges(start, end int) (r []Range) {
@@ -57,17 +56,3 @@ func toRanges(start, end int) (r []Range) {
 	}
 	return
 }
-
-func hasLocalStackTrace(err error) bool {
-	wrapped, ok := err.(interface {
-		Unwrap() error
-	})
-	if ok && hasLocalStackTrace(wrapped.Unwrap()) {
-		return true
-	}
-
-	_, ok = err.(interface {
-		StackTrace() errors.StackTrace
-	})
-	return ok
-}
diff --git a/frontend/gateway/gateway.go b/frontend/gateway/gateway.go
index ed9b3ce0..f70fdbaa 100644
--- a/frontend/gateway/gateway.go
+++ b/frontend/gateway/gateway.go
@@ -27,7 +27,6 @@ import (
 	"github.com/moby/buildkit/identity"
 	"github.com/moby/buildkit/session"
 	"github.com/moby/buildkit/solver"
-	"github.com/moby/buildkit/solver/errdefs"
 	opspb "github.com/moby/buildkit/solver/pb"
 	"github.com/moby/buildkit/util/apicaps"
 	"github.com/moby/buildkit/util/grpcerrors"
@@ -674,7 +673,7 @@ func (lbf *llbBridgeForwarder) Ping(context.Context, *pb.PingRequest) (*pb.PongR
 
 func (lbf *llbBridgeForwarder) Return(ctx context.Context, in *pb.ReturnRequest) (*pb.ReturnResponse, error) {
 	if in.Error != nil {
-		return lbf.setResult(nil, errdefs.FromGRPC(status.ErrorProto(&spb.Status{
+		return lbf.setResult(nil, grpcerrors.FromGRPC(status.ErrorProto(&spb.Status{
 			Code:    in.Error.Code,
 			Message: in.Error.Message,
 			Details: convertGogoAny(in.Error.Details),
diff --git a/frontend/gateway/grpcclient/client.go b/frontend/gateway/grpcclient/client.go
index baf02d32..9e73cdc3 100644
--- a/frontend/gateway/grpcclient/client.go
+++ b/frontend/gateway/grpcclient/client.go
@@ -15,7 +15,6 @@ import (
 	"github.com/moby/buildkit/client/llb"
 	"github.com/moby/buildkit/frontend/gateway/client"
 	pb "github.com/moby/buildkit/frontend/gateway/pb"
-	"github.com/moby/buildkit/solver/errdefs"
 	opspb "github.com/moby/buildkit/solver/pb"
 	"github.com/moby/buildkit/util/apicaps"
 	"github.com/moby/buildkit/util/grpcerrors"
@@ -154,7 +153,7 @@ func (c *grpcClient) Run(ctx context.Context, f client.BuildFunc) (retError erro
 				}
 			}
 			if retError != nil {
-				st, _ := status.FromError(errdefs.ToGRPC(retError))
+				st, _ := status.FromError(grpcerrors.ToGRPC(retError))
 				stp := st.Proto()
 				req.Error = &rpc.Status{
 					Code:    stp.Code,
diff --git a/solver/errdefs/errdefs.pb.go b/solver/errdefs/errdefs.pb.go
index f62251d9..abe03830 100644
--- a/solver/errdefs/errdefs.pb.go
+++ b/solver/errdefs/errdefs.pb.go
@@ -20,132 +20,6 @@ var _ = math.Inf
 // proto package needs to be updated.
 const _ = proto.ProtoPackageIsVersion3 // please upgrade the proto package
 
-type Stack struct {
-	Frames               []*Frame `protobuf:"bytes,1,rep,name=frames,proto3" json:"frames,omitempty"`
-	Cmdline              []string `protobuf:"bytes,2,rep,name=cmdline,proto3" json:"cmdline,omitempty"`
-	Pid                  int32    `protobuf:"varint,3,opt,name=pid,proto3" json:"pid,omitempty"`
-	Version              string   `protobuf:"bytes,4,opt,name=version,proto3" json:"version,omitempty"`
-	Revision             string   `protobuf:"bytes,5,opt,name=revision,proto3" json:"revision,omitempty"`
-	XXX_NoUnkeyedLiteral struct{} `json:"-"`
-	XXX_unrecognized     []byte   `json:"-"`
-	XXX_sizecache        int32    `json:"-"`
-}
-
-func (m *Stack) Reset()         { *m = Stack{} }
-func (m *Stack) String() string { return proto.CompactTextString(m) }
-func (*Stack) ProtoMessage()    {}
-func (*Stack) Descriptor() ([]byte, []int) {
-	return fileDescriptor_689dc58a5060aff5, []int{0}
-}
-
-func (m *Stack) XXX_Unmarshal(b []byte) error {
-	return xxx_messageInfo_Stack.Unmarshal(m, b)
-}
-func (m *Stack) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
-	return xxx_messageInfo_Stack.Marshal(b, m, deterministic)
-}
-func (m *Stack) XXX_Merge(src proto.Message) {
-	xxx_messageInfo_Stack.Merge(m, src)
-}
-func (m *Stack) XXX_Size() int {
-	return xxx_messageInfo_Stack.Size(m)
-}
-func (m *Stack) XXX_DiscardUnknown() {
-	xxx_messageInfo_Stack.DiscardUnknown(m)
-}
-
-var xxx_messageInfo_Stack proto.InternalMessageInfo
-
-func (m *Stack) GetFrames() []*Frame {
-	if m != nil {
-		return m.Frames
-	}
-	return nil
-}
-
-func (m *Stack) GetCmdline() []string {
-	if m != nil {
-		return m.Cmdline
-	}
-	return nil
-}
-
-func (m *Stack) GetPid() int32 {
-	if m != nil {
-		return m.Pid
-	}
-	return 0
-}
-
-func (m *Stack) GetVersion() string {
-	if m != nil {
-		return m.Version
-	}
-	return ""
-}
-
-func (m *Stack) GetRevision() string {
-	if m != nil {
-		return m.Revision
-	}
-	return ""
-}
-
-type Frame struct {
-	Name                 string   `protobuf:"bytes,1,opt,name=Name,proto3" json:"Name,omitempty"`
-	File                 string   `protobuf:"bytes,2,opt,name=File,proto3" json:"File,omitempty"`
-	Line                 int32    `protobuf:"varint,3,opt,name=Line,proto3" json:"Line,omitempty"`
-	XXX_NoUnkeyedLiteral struct{} `json:"-"`
-	XXX_unrecognized     []byte   `json:"-"`
-	XXX_sizecache        int32    `json:"-"`
-}
-
-func (m *Frame) Reset()         { *m = Frame{} }
-func (m *Frame) String() string { return proto.CompactTextString(m) }
-func (*Frame) ProtoMessage()    {}
-func (*Frame) Descriptor() ([]byte, []int) {
-	return fileDescriptor_689dc58a5060aff5, []int{1}
-}
-
-func (m *Frame) XXX_Unmarshal(b []byte) error {
-	return xxx_messageInfo_Frame.Unmarshal(m, b)
-}
-func (m *Frame) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
-	return xxx_messageInfo_Frame.Marshal(b, m, deterministic)
-}
-func (m *Frame) XXX_Merge(src proto.Message) {
-	xxx_messageInfo_Frame.Merge(m, src)
-}
-func (m *Frame) XXX_Size() int {
-	return xxx_messageInfo_Frame.Size(m)
-}
-func (m *Frame) XXX_DiscardUnknown() {
-	xxx_messageInfo_Frame.DiscardUnknown(m)
-}
-
-var xxx_messageInfo_Frame proto.InternalMessageInfo
-
-func (m *Frame) GetName() string {
-	if m != nil {
-		return m.Name
-	}
-	return ""
-}
-
-func (m *Frame) GetFile() string {
-	if m != nil {
-		return m.File
-	}
-	return ""
-}
-
-func (m *Frame) GetLine() int32 {
-	if m != nil {
-		return m.Line
-	}
-	return 0
-}
-
 type Vertex struct {
 	Digest               string   `protobuf:"bytes,1,opt,name=digest,proto3" json:"digest,omitempty"`
 	XXX_NoUnkeyedLiteral struct{} `json:"-"`
@@ -157,7 +31,7 @@ func (m *Vertex) Reset()         { *m = Vertex{} }
 func (m *Vertex) String() string { return proto.CompactTextString(m) }
 func (*Vertex) ProtoMessage()    {}
 func (*Vertex) Descriptor() ([]byte, []int) {
-	return fileDescriptor_689dc58a5060aff5, []int{2}
+	return fileDescriptor_689dc58a5060aff5, []int{0}
 }
 
 func (m *Vertex) XXX_Unmarshal(b []byte) error {
@@ -199,7 +73,7 @@ func (m *Source) Reset()         { *m = Source{} }
 func (m *Source) String() string { return proto.CompactTextString(m) }
 func (*Source) ProtoMessage()    {}
 func (*Source) Descriptor() ([]byte, []int) {
-	return fileDescriptor_689dc58a5060aff5, []int{3}
+	return fileDescriptor_689dc58a5060aff5, []int{1}
 }
 
 func (m *Source) XXX_Unmarshal(b []byte) error {
@@ -260,7 +134,7 @@ func (m *Range) Reset()         { *m = Range{} }
 func (m *Range) String() string { return proto.CompactTextString(m) }
 func (*Range) ProtoMessage()    {}
 func (*Range) Descriptor() ([]byte, []int) {
-	return fileDescriptor_689dc58a5060aff5, []int{4}
+	return fileDescriptor_689dc58a5060aff5, []int{2}
 }
 
 func (m *Range) XXX_Unmarshal(b []byte) error {
@@ -307,7 +181,7 @@ func (m *Position) Reset()         { *m = Position{} }
 func (m *Position) String() string { return proto.CompactTextString(m) }
 func (*Position) ProtoMessage()    {}
 func (*Position) Descriptor() ([]byte, []int) {
-	return fileDescriptor_689dc58a5060aff5, []int{5}
+	return fileDescriptor_689dc58a5060aff5, []int{3}
 }
 
 func (m *Position) XXX_Unmarshal(b []byte) error {
@@ -343,8 +217,6 @@ func (m *Position) GetCharacter() int32 {
 }
 
 func init() {
-	proto.RegisterType((*Stack)(nil), "errdefs.Stack")
-	proto.RegisterType((*Frame)(nil), "errdefs.Frame")
 	proto.RegisterType((*Vertex)(nil), "errdefs.Vertex")
 	proto.RegisterType((*Source)(nil), "errdefs.Source")
 	proto.RegisterType((*Range)(nil), "errdefs.Range")
@@ -354,26 +226,20 @@ func init() {
 func init() { proto.RegisterFile("errdefs.proto", fileDescriptor_689dc58a5060aff5) }
 
 var fileDescriptor_689dc58a5060aff5 = []byte{
-	// 330 bytes of a gzipped FileDescriptorProto
-	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0x6c, 0x52, 0x4f, 0x4b, 0xfb, 0x40,
-	0x10, 0x25, 0xbf, 0x74, 0xd3, 0x66, 0xfa, 0x53, 0x74, 0x10, 0x09, 0xe2, 0x21, 0x44, 0xd0, 0x1e,
-	0xa4, 0x87, 0x7a, 0xf5, 0x56, 0xe8, 0x49, 0x44, 0xb6, 0xe8, 0x7d, 0x4d, 0xa6, 0x75, 0x31, 0x4d,
-	0xca, 0x66, 0x2d, 0x1e, 0xfc, 0x12, 0x7e, 0x63, 0x99, 0x49, 0x9a, 0x1e, 0xf4, 0x36, 0xef, 0x4f,
-	0xe6, 0xbd, 0x0c, 0x0b, 0x47, 0xe4, 0x5c, 0x41, 0xab, 0x66, 0xba, 0x75, 0xb5, 0xaf, 0x71, 0xd8,
-	0xc1, 0xec, 0x3b, 0x00, 0xb5, 0xf4, 0x26, 0x7f, 0xc7, 0x6b, 0x88, 0x56, 0xce, 0x6c, 0xa8, 0x49,
-	0x82, 0x34, 0x9c, 0x8c, 0x67, 0xc7, 0xd3, 0xfd, 0x27, 0x0b, 0xa6, 0x75, 0xa7, 0x62, 0x02, 0xc3,
-	0x7c, 0x53, 0x94, 0xb6, 0xa2, 0xe4, 0x5f, 0x1a, 0x4e, 0x62, 0xbd, 0x87, 0x78, 0x02, 0xe1, 0xd6,
-	0x16, 0x49, 0x98, 0x06, 0x13, 0xa5, 0x79, 0x64, 0xef, 0x8e, 0x5c, 0x63, 0xeb, 0x2a, 0x19, 0xa4,
-	0x01, 0x7b, 0x3b, 0x88, 0x17, 0x30, 0x72, 0xb4, 0xb3, 0x22, 0x29, 0x91, 0x7a, 0x9c, 0xcd, 0x41,
-	0x49, 0x24, 0x22, 0x0c, 0x1e, 0xcd, 0x86, 0x92, 0x40, 0x0c, 0x32, 0x33, 0xb7, 0xb0, 0x25, 0x67,
-	0x0b, 0xc7, 0x33, 0x73, 0x0f, 0xdc, 0xa7, 0x4d, 0x96, 0x39, 0x4b, 0x21, 0x7a, 0x21, 0xe7, 0xe9,
-	0x13, 0xcf, 0x21, 0x2a, 0xec, 0x9a, 0x1a, 0xdf, 0xed, 0xe9, 0x50, 0xf6, 0x05, 0xd1, 0xb2, 0xfe,
-	0x70, 0x39, 0xe1, 0x2d, 0xc4, 0x65, 0x9d, 0x1b, 0x6f, 0xeb, 0xea, 0xf7, 0xdf, 0x6b, 0x53, 0xad,
-	0x49, 0x1f, 0x0c, 0x5c, 0x7d, 0x65, 0x4b, 0xaa, 0xb8, 0x59, 0xdb, 0xa2, 0xc7, 0x78, 0x06, 0x8a,
-	0x8d, 0xa5, 0x54, 0x89, 0x75, 0x0b, 0xb8, 0x5f, 0x61, 0xbc, 0x91, 0x1b, 0xfc, 0xd7, 0x32, 0x67,
-	0xcf, 0xa0, 0x64, 0x33, 0xde, 0x80, 0x6a, 0xbc, 0x71, 0x6d, 0xbb, 0xf1, 0xec, 0xb4, 0x0f, 0x7e,
-	0xaa, 0x1b, 0xcb, 0x89, 0xba, 0xd5, 0xf1, 0x0a, 0x42, 0xaa, 0x0a, 0x89, 0xfc, 0xd3, 0xc6, 0x6a,
-	0x76, 0x0f, 0xa3, 0x3d, 0xd1, 0x9f, 0x25, 0x38, 0x9c, 0x05, 0x2f, 0x21, 0x9e, 0xbf, 0x19, 0x67,
-	0x72, 0x4f, 0x4e, 0x56, 0x29, 0x7d, 0x20, 0x5e, 0x23, 0x79, 0x1d, 0x77, 0x3f, 0x01, 0x00, 0x00,
-	0xff, 0xff, 0x52, 0xed, 0x4a, 0x2a, 0x2e, 0x02, 0x00, 0x00,
+	// 237 bytes of a gzipped FileDescriptorProto
+	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0x6c, 0x90, 0xbb, 0x4b, 0x04, 0x31,
+	0x10, 0xc6, 0x59, 0xf7, 0xb2, 0xde, 0xce, 0xa9, 0xe0, 0x20, 0x12, 0xc4, 0x62, 0x59, 0x0b, 0xb7,
+	0x90, 0x2b, 0xce, 0xd6, 0xce, 0xd6, 0x42, 0x22, 0xda, 0xc7, 0xdd, 0xb9, 0x33, 0xb0, 0x26, 0x32,
+	0x89, 0x60, 0xe1, 0x1f, 0x2f, 0x99, 0xbd, 0x47, 0x63, 0x37, 0xdf, 0x83, 0xdf, 0x17, 0x02, 0xa7,
+	0xc4, 0x3c, 0xd0, 0x3a, 0x2e, 0xbf, 0x38, 0xa4, 0x80, 0xc7, 0x5b, 0xd9, 0x36, 0x50, 0xbd, 0x11,
+	0x27, 0xfa, 0xc1, 0x4b, 0xa8, 0x06, 0xb7, 0xa1, 0x98, 0x74, 0xd1, 0x14, 0x5d, 0x6d, 0xb6, 0xaa,
+	0xfd, 0x85, 0xea, 0x25, 0x7c, 0x73, 0x4f, 0x78, 0x07, 0xf5, 0x18, 0x7a, 0x9b, 0x5c, 0xf0, 0x51,
+	0x17, 0x4d, 0xd9, 0x2d, 0x56, 0x67, 0xcb, 0x1d, 0xd7, 0x58, 0xbf, 0x21, 0x73, 0x28, 0xe0, 0x15,
+	0xcc, 0xd7, 0x6e, 0x24, 0x6f, 0x3f, 0x49, 0x1f, 0x09, 0x71, 0xaf, 0xf1, 0x02, 0x54, 0x2e, 0x8e,
+	0xba, 0x94, 0x60, 0x12, 0x88, 0x30, 0x1b, 0x6c, 0xb2, 0x7a, 0xd6, 0x14, 0xdd, 0x89, 0x91, 0xbb,
+	0x7d, 0x05, 0x25, 0x64, 0xbc, 0x05, 0x15, 0x93, 0xe5, 0xe9, 0x75, 0x8b, 0xd5, 0xf9, 0x7e, 0xf8,
+	0x39, 0x44, 0x97, 0x17, 0xcd, 0x94, 0xe3, 0x0d, 0x94, 0xe4, 0x07, 0x99, 0xfc, 0xb7, 0x96, 0xd3,
+	0xf6, 0x01, 0xe6, 0x3b, 0x23, 0xcf, 0x3e, 0x39, 0x4f, 0x02, 0x56, 0x46, 0x6e, 0xbc, 0x86, 0xfa,
+	0xf1, 0xc3, 0xb2, 0xed, 0x13, 0xb1, 0xa0, 0x94, 0x39, 0x18, 0xef, 0x95, 0x7c, 0xe2, 0xfd, 0x5f,
+	0x00, 0x00, 0x00, 0xff, 0xff, 0x49, 0x7f, 0xe8, 0xa9, 0x55, 0x01, 0x00, 0x00,
 }
diff --git a/solver/errdefs/errdefs.proto b/solver/errdefs/errdefs.proto
index c4016222..951140c9 100644
--- a/solver/errdefs/errdefs.proto
+++ b/solver/errdefs/errdefs.proto
@@ -2,20 +2,6 @@ syntax = "proto3";
 
 package errdefs;
 
-message Stack {
-    repeated Frame frames = 1;
-    repeated string cmdline = 2;
-    int32 pid = 3;
-    string version = 4;
-    string revision = 5;
-}
-
-message Frame {
-    string Name = 1;
-    string File = 2;
-    int32 Line = 3;
-}
-
 message Vertex {
     string digest = 1;
 }
@@ -35,4 +21,4 @@ message Range {
 message Position {
     int32 Line = 1;
     int32 Character = 2;
-}
\ No newline at end of file
+}
diff --git a/solver/errdefs/grpc.go b/solver/errdefs/grpc.go
deleted file mode 100644
index e6de6968..00000000
--- a/solver/errdefs/grpc.go
+++ /dev/null
@@ -1,156 +0,0 @@
-package errdefs
-
-import (
-	"github.com/golang/protobuf/proto"
-	"github.com/golang/protobuf/ptypes"
-	"github.com/opencontainers/go-digest"
-	"github.com/pkg/errors"
-	spb "google.golang.org/genproto/googleapis/rpc/status"
-	"google.golang.org/grpc/codes"
-	"google.golang.org/grpc/status"
-)
-
-func ToGRPC(err error) error {
-	if err == nil {
-		return nil
-	}
-	st, ok := AsGRPCStatus(err)
-	if !ok || st == nil {
-		st = status.New(Code(err), err.Error())
-	}
-	if st.Code() != Code(err) {
-		pb := st.Proto()
-		pb.Code = int32(Code(err))
-		st = status.FromProto(pb)
-	}
-
-	var details []proto.Message
-
-	for _, st := range Traces(err) {
-		details = append(details, st)
-	}
-
-	for _, st := range Sources(err) {
-		details = append(details, st)
-	}
-
-	var ve *VertexError
-	if errors.As(err, &ve) {
-		details = append(details, &ve.Vertex)
-	}
-
-	if len(details) > 0 {
-		if st2, err := st.WithDetails(details...); err == nil {
-			st = st2
-		}
-	}
-
-	return st.Err()
-}
-
-func Code(err error) codes.Code {
-	if se, ok := err.(interface {
-		Code() codes.Code
-	}); ok {
-		return se.Code()
-	}
-
-	wrapped, ok := err.(interface {
-		Unwrap() error
-	})
-	if ok {
-		return Code(wrapped.Unwrap())
-	}
-
-	return status.FromContextError(err).Code()
-}
-
-func WrapCode(err error, code codes.Code) error {
-	return &withCode{error: err, code: code}
-}
-
-func AsGRPCStatus(err error) (*status.Status, bool) {
-	if err == nil {
-		return nil, true
-	}
-	if se, ok := err.(interface {
-		GRPCStatus() *status.Status
-	}); ok {
-		return se.GRPCStatus(), true
-	}
-
-	wrapped, ok := err.(interface {
-		Unwrap() error
-	})
-	if ok {
-		return AsGRPCStatus(wrapped.Unwrap())
-	}
-
-	return nil, false
-}
-
-func FromGRPC(err error) error {
-	if err == nil {
-		return nil
-	}
-	st, ok := status.FromError(err)
-	if !ok {
-		return err
-	}
-
-	pb := st.Proto()
-
-	n := &spb.Status{
-		Code:    pb.Code,
-		Message: pb.Message,
-	}
-
-	details := make([]interface{}, 0, len(pb.Details))
-
-	// details that we don't understand are copied as proto
-	for _, d := range pb.Details {
-		detail := &ptypes.DynamicAny{}
-		if err := ptypes.UnmarshalAny(d, detail); err != nil {
-			n.Details = append(n.Details, d)
-			continue
-		}
-		switch detail.Message.(type) {
-		case *Stack, *Vertex, *Source:
-			details = append(details, detail.Message)
-		default:
-			n.Details = append(n.Details, d)
-		}
-	}
-
-	err = status.FromProto(n).Err()
-
-	for _, d := range details {
-		switch v := d.(type) {
-		case *Stack:
-			if v != nil {
-				err = &withStack{stack: *v, error: err}
-			}
-		case *Vertex:
-			err = WrapVertex(err, digest.Digest(v.Digest))
-		case *Source:
-			if v != nil {
-				err = WithSource(err, *v)
-			}
-		}
-	}
-
-	if !hasLocalStackTrace(err) {
-		err = errors.WithStack(err)
-	}
-
-	return err
-}
-
-type withCode struct {
-	code codes.Code
-	error
-}
-
-func (e *withCode) Unwrap() error {
-	return e.error
-}
diff --git a/solver/errdefs/source.go b/solver/errdefs/source.go
index be0cddbe..74284db5 100644
--- a/solver/errdefs/source.go
+++ b/solver/errdefs/source.go
@@ -1,6 +1,9 @@
 package errdefs
 
-import "github.com/pkg/errors"
+import (
+	"github.com/moby/buildkit/util/grpcerrors"
+	"github.com/pkg/errors"
+)
 
 func WithSource(err error, src Source) error {
 	if err == nil {
@@ -18,6 +21,10 @@ func (e *ErrorSource) Unwrap() error {
 	return e.error
 }
 
+func (e *ErrorSource) ToProto() grpcerrors.TypedErrorProto {
+	return &e.Source
+}
+
 func Sources(err error) []*Source {
 	var out []*Source
 	var es *ErrorSource
@@ -27,3 +34,7 @@ func Sources(err error) []*Source {
 	}
 	return out
 }
+
+func (s *Source) WrapError(err error) error {
+	return &ErrorSource{error: err, Source: *s}
+}
diff --git a/solver/errdefs/stack.go b/solver/errdefs/stack.go
deleted file mode 100644
index d924a433..00000000
--- a/solver/errdefs/stack.go
+++ /dev/null
@@ -1,133 +0,0 @@
-package errdefs
-
-import (
-	"fmt"
-	io "io"
-	"os"
-	"strconv"
-	"strings"
-
-	"github.com/pkg/errors"
-)
-
-var version string
-var revision string
-
-func SetVersionInfo(v, r string) {
-	version = v
-	revision = r
-}
-
-func Traces(err error) []*Stack {
-	var st []*Stack
-
-	wrapped, ok := err.(interface {
-		Unwrap() error
-	})
-	if ok {
-		st = Traces(wrapped.Unwrap())
-	}
-
-	if ste, ok := err.(interface {
-		StackTrace() errors.StackTrace
-	}); ok {
-		st = append(st, convertStack(ste.StackTrace()))
-	}
-
-	if ste, ok := err.(interface {
-		StackTrace() *Stack
-	}); ok {
-		st = append(st, ste.StackTrace())
-	}
-
-	return st
-}
-
-func hasLocalStackTrace(err error) bool {
-	wrapped, ok := err.(interface {
-		Unwrap() error
-	})
-	if ok && hasLocalStackTrace(wrapped.Unwrap()) {
-		return true
-	}
-
-	_, ok = err.(interface {
-		StackTrace() errors.StackTrace
-	})
-	return ok
-}
-
-func StackFormatter(err error) fmt.Formatter {
-	return &stackFormatter{err}
-}
-
-type stackFormatter struct {
-	error
-}
-
-func (w *stackFormatter) Format(s fmt.State, verb rune) {
-	switch verb {
-	case 'v':
-		if s.Flag('+') {
-			fmt.Fprintf(s, "%+v\n", w.Error())
-			for _, stack := range Traces(w.error) {
-				fmt.Fprintf(s, "%d %s %s\n", stack.Pid, stack.Version, strings.Join(stack.Cmdline, " "))
-				for _, f := range stack.Frames {
-					fmt.Fprintf(s, "%s\n\t%s:%d\n", f.Name, f.File, f.Line)
-				}
-				fmt.Fprintf(s, "\n")
-			}
-			return
-		}
-		fallthrough
-	case 's':
-		io.WriteString(s, w.Error())
-	case 'q':
-		fmt.Fprintf(s, "%q", w.Error())
-	}
-}
-
-func convertStack(s errors.StackTrace) *Stack {
-	var out Stack
-	for _, f := range s {
-		dt, err := f.MarshalText()
-		if err != nil {
-			continue
-		}
-		p := strings.SplitN(string(dt), " ", 2)
-		if len(p) != 2 {
-			continue
-		}
-		idx := strings.LastIndexByte(p[1], ':')
-		if idx == -1 {
-			continue
-		}
-		line, err := strconv.Atoi(p[1][idx+1:])
-		if err != nil {
-			continue
-		}
-		out.Frames = append(out.Frames, &Frame{
-			Name: p[0],
-			File: p[1][:idx],
-			Line: int32(line),
-		})
-	}
-	out.Cmdline = os.Args
-	out.Pid = int32(os.Getpid())
-	out.Version = version
-	out.Revision = revision
-	return &out
-}
-
-type withStack struct {
-	stack Stack
-	error
-}
-
-func (e *withStack) Unwrap() error {
-	return e.error
-}
-
-func (e *withStack) StackTrace() *Stack {
-	return &e.stack
-}
diff --git a/solver/errdefs/vertex.go b/solver/errdefs/vertex.go
index eb06a018..adc5e378 100644
--- a/solver/errdefs/vertex.go
+++ b/solver/errdefs/vertex.go
@@ -1,6 +1,9 @@
 package errdefs
 
-import "github.com/opencontainers/go-digest"
+import (
+	"github.com/moby/buildkit/util/grpcerrors"
+	"github.com/opencontainers/go-digest"
+)
 
 type VertexError struct {
 	Vertex
@@ -11,9 +14,17 @@ func (e *VertexError) Unwrap() error {
 	return e.error
 }
 
+func (e *VertexError) ToProto() grpcerrors.TypedErrorProto {
+	return &e.Vertex
+}
+
 func WrapVertex(err error, dgst digest.Digest) error {
 	if err == nil {
 		return nil
 	}
 	return &VertexError{Vertex: Vertex{Digest: dgst.String()}, error: err}
 }
+
+func (v *Vertex) WrapError(err error) error {
+	return &VertexError{error: err, Vertex: *v}
+}
diff --git a/util/grpcerrors/grpcerrors.go b/util/grpcerrors/grpcerrors.go
index bf285756..cecc68c3 100644
--- a/util/grpcerrors/grpcerrors.go
+++ b/util/grpcerrors/grpcerrors.go
@@ -60,6 +60,12 @@ func Code(err error) codes.Code {
 		return se.Code()
 	}
 
+	if se, ok := err.(interface {
+		GRPCStatus() *status.Status
+	}); ok {
+		return se.GRPCStatus().Code()
+	}
+
 	wrapped, ok := err.(interface {
 		Unwrap() error
 	})
diff --git a/util/stack/stack.go b/util/stack/stack.go
index 9b6f6950..6d3cfc83 100644
--- a/util/stack/stack.go
+++ b/util/stack/stack.go
@@ -71,25 +71,29 @@ func hasLocalStackTrace(err error) bool {
 	return ok
 }
 
-func StackFormatter(err error) fmt.Formatter {
-	return &stackFormatter{err}
+func Formatter(err error) fmt.Formatter {
+	return &formatter{err}
 }
 
-type stackFormatter struct {
+type formatter struct {
 	error
 }
 
-func (w *stackFormatter) Format(s fmt.State, verb rune) {
+func (w *formatter) Format(s fmt.State, verb rune) {
+	if w.error == nil {
+		fmt.Fprintf(s, "%v", w.error)
+		return
+	}
 	switch verb {
 	case 'v':
 		if s.Flag('+') {
-			fmt.Fprintf(s, "%+v\n", w.Error())
+			fmt.Fprintf(s, "%s\n", w.Error())
 			for _, stack := range Traces(w.error) {
 				fmt.Fprintf(s, "%d %s %s\n", stack.Pid, stack.Version, strings.Join(stack.Cmdline, " "))
 				for _, f := range stack.Frames {
 					fmt.Fprintf(s, "%s\n\t%s:%d\n", f.Name, f.File, f.Line)
 				}
-				fmt.Fprintf(s, "\n")
+				fmt.Fprintln(s)
 			}
 			return
 		}