diff --git a/chain/stmgr/forks_test.go b/chain/stmgr/forks_test.go
index 99770c01c..a61752616 100644
--- a/chain/stmgr/forks_test.go
+++ b/chain/stmgr/forks_test.go
@@ -12,6 +12,7 @@ import (
 	init_ "github.com/filecoin-project/specs-actors/actors/builtin/init"
 	"github.com/filecoin-project/specs-actors/actors/runtime"
 	"github.com/filecoin-project/specs-actors/actors/util/adt"
+	"golang.org/x/xerrors"
 
 	"github.com/filecoin-project/lotus/build"
 	"github.com/filecoin-project/lotus/chain/actors"
@@ -57,7 +58,7 @@ func (tas *testActorState) UnmarshalCBOR(r io.Reader) error {
 		return err
 	}
 	if t != cbg.MajUnsignedInt {
-		return fmt.Errorf("wrong type in test actor state")
+		return fmt.Errorf("wrong type in test actor state (got %d)", t)
 	}
 	tas.HasUpgraded = v
 	return nil
@@ -70,38 +71,29 @@ func (ta *testActor) Exports() []interface{} {
 	}
 }
 
-func (ta *testActor) Constructor(act *types.Actor, vmctx types.VMContext, params *struct{}) ([]byte, aerrors.ActorError) {
-	c, err := vmctx.Storage().Put(&testActorState{11})
-	if err != nil {
-		return nil, err
-	}
-	empty, err := vmctx.Storage().Put(&adt.EmptyValue{})
-	if err != nil {
-		return nil, err
-	}
+func (ta *testActor) Constructor(rt runtime.Runtime, params *adt.EmptyValue) *adt.EmptyValue {
 
-	fmt.Println("NEW ACTOR ADDRESS IS: ", vmctx.Message().To.String())
+	rt.State().Create(&testActorState{11})
+	fmt.Println("NEW ACTOR ADDRESS IS: ", rt.Message().Receiver())
 
-	return nil, vmctx.Storage().Commit(empty, c)
+	return &adt.EmptyValue{}
 }
 
-func (ta *testActor) TestMethod(act *types.Actor, vmctx types.VMContext, params *struct{}) ([]byte, aerrors.ActorError) {
+func (ta *testActor) TestMethod(rt runtime.Runtime, params *adt.EmptyValue) *adt.EmptyValue {
 	var st testActorState
-	if err := vmctx.Storage().Get(vmctx.Storage().GetHead(), &st); err != nil {
-		return nil, err
-	}
+	rt.State().Readonly(&st)
 
-	if vmctx.BlockHeight() > testForkHeight {
+	if rt.CurrEpoch() > testForkHeight {
 		if st.HasUpgraded != 55 {
-			return nil, aerrors.Fatal("fork updating applied in wrong order")
+			panic(aerrors.Fatal("fork updating applied in wrong order"))
 		}
 	} else {
 		if st.HasUpgraded != 11 {
-			return nil, aerrors.Fatal("fork updating happened too early")
+			panic(aerrors.Fatal("fork updating happened too early"))
 		}
 	}
 
-	return nil, nil
+	return &adt.EmptyValue{}
 }
 
 func TestForkHeightTriggers(t *testing.T) {
@@ -125,7 +117,7 @@ func TestForkHeightTriggers(t *testing.T) {
 	}
 
 	// predicting the address here... may break if other assumptions change
-	taddr, err := address.NewIDAddress(1000)
+	taddr, err := address.NewIDAddress(1002)
 	if err != nil {
 		t.Fatal(err)
 	}
@@ -144,7 +136,7 @@ func TestForkHeightTriggers(t *testing.T) {
 
 		var tas testActorState
 		if err := cst.Get(ctx, act.Head, &tas); err != nil {
-			return cid.Undef, err
+			return cid.Undef, xerrors.Errorf("in fork handler, failed to run get: %w", err)
 		}
 
 		tas.HasUpgraded = 55
diff --git a/chain/vm/invoker.go b/chain/vm/invoker.go
index 70a7011e5..df5ec704e 100644
--- a/chain/vm/invoker.go
+++ b/chain/vm/invoker.go
@@ -5,7 +5,6 @@ import (
 	"encoding/hex"
 	"fmt"
 	"reflect"
-	"strings"
 
 	"github.com/ipfs/go-cid"
 	cbg "github.com/whyrusleeping/cbor-gen"
@@ -89,17 +88,7 @@ type Invokee interface {
 var tVMContext = reflect.TypeOf((*types.VMContext)(nil)).Elem()
 var tAError = reflect.TypeOf((*aerrors.ActorError)(nil)).Elem()
 
-func (i *invoker) transform(instance Invokee) (nativeCode, error) {
-	itype := reflect.TypeOf(instance)
-	if strings.Contains(itype.PkgPath(), "github.com/filecoin-project/specs-actors/") {
-		return i.transformSpec(instance)
-	} else {
-		return i.transformLotus(instance)
-	}
-
-}
-
-func (*invoker) transformSpec(instance Invokee) (nativeCode, error) {
+func (*invoker) transform(instance Invokee) (nativeCode, error) {
 	itype := reflect.TypeOf(instance)
 	exports := instance.Exports()
 	for i, m := range exports {
@@ -178,81 +167,6 @@ func (*invoker) transformSpec(instance Invokee) (nativeCode, error) {
 	return code, nil
 }
 
-func (*invoker) transformLotus(instance Invokee) (nativeCode, error) {
-	itype := reflect.TypeOf(instance)
-	exports := instance.Exports()
-	for i, m := range exports {
-		i := i
-		newErr := func(format string, args ...interface{}) error {
-			str := fmt.Sprintf(format, args...)
-			return fmt.Errorf("transform(%s) export(%d): %s", itype.Name(), i, str)
-		}
-		if m == nil {
-			continue
-		}
-		meth := reflect.ValueOf(m)
-		t := meth.Type()
-		if t.Kind() != reflect.Func {
-			return nil, newErr("is not a function")
-		}
-		if t.NumIn() != 3 {
-			return nil, newErr("wrong number of inputs should be: " +
-				"*types.Actor, *VMContext, <type of parameter>")
-		}
-		if t.In(0) != reflect.TypeOf(&types.Actor{}) {
-			return nil, newErr("first arguemnt should be *types.Actor")
-		}
-		if t.In(1) != tVMContext {
-			return nil, newErr("second argument should be types.VMContext")
-		}
-
-		if t.In(2).Kind() != reflect.Ptr {
-			return nil, newErr("parameter has to be a pointer to parameter, is: %s",
-				t.In(2).Kind())
-		}
-
-		if t.NumOut() != 2 {
-			return nil, newErr("wrong number of outputs should be: " +
-				"(InvokeRet, error)")
-		}
-		if t.Out(0) != reflect.TypeOf([]byte{}) {
-			return nil, newErr("first output should be slice of bytes")
-		}
-		if !t.Out(1).Implements(tAError) {
-			return nil, newErr("second output should be ActorError type")
-		}
-
-	}
-	code := make(nativeCode, len(exports))
-	for id, m := range exports {
-		meth := reflect.ValueOf(m)
-		code[id] = reflect.MakeFunc(reflect.TypeOf((invokeFunc)(nil)),
-			func(in []reflect.Value) []reflect.Value {
-				paramT := meth.Type().In(2).Elem()
-				param := reflect.New(paramT)
-
-				inBytes := in[2].Interface().([]byte)
-				if len(inBytes) > 0 {
-					if err := DecodeParams(inBytes, param.Interface()); err != nil {
-						aerr := aerrors.Absorb(err, 1, "failed to decode parameters")
-						return []reflect.Value{
-							reflect.ValueOf([]byte{}),
-							// Below is a hack, fixed in Go 1.13
-							// https://git.io/fjXU6
-							reflect.ValueOf(&aerr).Elem(),
-						}
-					}
-				}
-
-				return meth.Call([]reflect.Value{
-					in[0], in[1], param,
-				})
-			}).Interface().(invokeFunc)
-
-	}
-	return code, nil
-}
-
 func DecodeParams(b []byte, out interface{}) error {
 	um, ok := out.(cbg.CBORUnmarshaler)
 	if !ok {
diff --git a/go.mod b/go.mod
index e0acf3672..9dde71d44 100644
--- a/go.mod
+++ b/go.mod
@@ -23,7 +23,7 @@ require (
 	github.com/filecoin-project/go-paramfetch v0.0.2-0.20200218225740-47c639bab663
 	github.com/filecoin-project/go-sectorbuilder v0.0.2-0.20200228181617-f00e2c4cc050
 	github.com/filecoin-project/go-statestore v0.1.0
-	github.com/filecoin-project/specs-actors v0.0.0-20200228215954-2c5be7cfad99
+	github.com/filecoin-project/specs-actors v0.0.0-20200229011003-1d726e3afd04
 	github.com/gbrlsnchs/jwt/v3 v3.0.0-beta.1
 	github.com/go-ole/go-ole v1.2.4 // indirect
 	github.com/google/uuid v1.1.1
@@ -114,7 +114,3 @@ require (
 replace github.com/golangci/golangci-lint => github.com/golangci/golangci-lint v1.18.0
 
 replace github.com/filecoin-project/filecoin-ffi => ./extern/filecoin-ffi
-
-replace github.com/filecoin-project/specs-actors => ../specs-actors
-
-replace github.com/filecoin-project/go-fil-markets => ../go-fil-markets
diff --git a/go.sum b/go.sum
index f1c824528..81142d610 100644
--- a/go.sum
+++ b/go.sum
@@ -99,6 +99,7 @@ github.com/fatih/color v1.8.0/go.mod h1:3l45GVGkyrnYNl9HoIjnp2NnNWvh6hLAqD8yTfGj
 github.com/fd/go-nat v1.0.0/go.mod h1:BTBu/CKvMmOMUPkKVef1pngt2WFH/lg7E6yQnulfp6E=
 github.com/filecoin-project/chain-validation v0.0.3 h1:luT/8kJ0WdMIqQ9Bm31W4JkuYCW0wUb26AvnD4WK59M=
 github.com/filecoin-project/chain-validation v0.0.3/go.mod h1:NCEGFjcWRjb8akWFSOXvU6n2efkWIqAeOKU6o5WBGQw=
+github.com/filecoin-project/go-address v0.0.0-20200107215422-da8eea2842b5/go.mod h1:SAOwJoakQ8EPjwNIsiakIQKsoKdkcbx8U3IapgCg9R0=
 github.com/filecoin-project/go-address v0.0.2-0.20200218010043-eb9bb40ed5be h1:TooKBwR/g8jG0hZ3lqe9S5sy2vTUcLOZLlz3M5wGn2E=
 github.com/filecoin-project/go-address v0.0.2-0.20200218010043-eb9bb40ed5be/go.mod h1:SAOwJoakQ8EPjwNIsiakIQKsoKdkcbx8U3IapgCg9R0=
 github.com/filecoin-project/go-amt-ipld/v2 v2.0.1-0.20200131012142-05d80eeccc5e h1:IOoff6yAZSJ5zHCPY2jzGNwQYQU6ygsRVe/cSnJrY+o=
@@ -125,6 +126,11 @@ github.com/filecoin-project/go-statemachine v0.0.0-20200226041606-2074af6d51d9 h
 github.com/filecoin-project/go-statemachine v0.0.0-20200226041606-2074af6d51d9/go.mod h1:FGwQgZAt2Gh5mjlwJUlVB62JeYdo+if0xWxSEfBD9ig=
 github.com/filecoin-project/go-statestore v0.1.0 h1:t56reH59843TwXHkMcwyuayStBIiWBRilQjQ+5IiwdQ=
 github.com/filecoin-project/go-statestore v0.1.0/go.mod h1:LFc9hD+fRxPqiHiaqUEZOinUJB4WARkRfNl10O7kTnI=
+github.com/filecoin-project/specs-actors v0.0.0-20200210130641-2d1fbd8672cf/go.mod h1:xtDZUB6pe4Pksa/bAJbJ693OilaC5Wbot9jMhLm3cZA=
+github.com/filecoin-project/specs-actors v0.0.0-20200226200336-94c9b92b2775/go.mod h1:0HAWYrvajFHDgRaKbF0rl+IybVLZL5z4gQ8koCMPhoU=
+github.com/filecoin-project/specs-actors v0.0.0-20200228215954-2c5be7cfad99/go.mod h1:0HAWYrvajFHDgRaKbF0rl+IybVLZL5z4gQ8koCMPhoU=
+github.com/filecoin-project/specs-actors v0.0.0-20200229011003-1d726e3afd04 h1:O343OeQLkLWLj5ZqQ5nhevAGBTeB5LioiA53ddScqdY=
+github.com/filecoin-project/specs-actors v0.0.0-20200229011003-1d726e3afd04/go.mod h1:0HAWYrvajFHDgRaKbF0rl+IybVLZL5z4gQ8koCMPhoU=
 github.com/fsnotify/fsnotify v1.4.7 h1:IXs+QLmnXW2CcXuY+8Mzv/fWEsPGWxqefPtCP5CnV9I=
 github.com/fsnotify/fsnotify v1.4.7/go.mod h1:jwhsz4b93w/PPRr/qN1Yymfu8t87LnFCMoQvtojpjFo=
 github.com/gbrlsnchs/jwt/v3 v3.0.0-beta.1 h1:EzDjxMg43q1tA2c0MV3tNbaontnHLplHyFF6M5KiVP0=