diff --git a/vendor.conf b/vendor.conf
index 1b4e23694b4cc..800233514d611 100644
--- a/vendor.conf
+++ b/vendor.conf
@@ -26,8 +26,8 @@ github.com/imdario/mergo                            7c29201646fa3de8506f70121347
 golang.org/x/sync                                   e225da77a7e68af35c70ccbf71af2b83e6acac3c
 
 # buildkit
-github.com/moby/buildkit                            928f3b480d7460aacb401f68610058ffdb549aca
-github.com/tonistiigi/fsutil                        3d2716dd0a4d06ff854241c7e8b6f3f904e1719f
+github.com/moby/buildkit                            926935b590c94c3659ebcc49cf44da47c1a65ff6
+github.com/tonistiigi/fsutil                        0f039a052ca1da01626278199624b62aed9b3729
 github.com/grpc-ecosystem/grpc-opentracing          8e809c8a86450a29b90dcc9efbf062d0fe6d9746
 github.com/opentracing/opentracing-go               1361b9cd60be79c4c3a7fa9841b3c132e40066a7
 github.com/google/shlex                             6f45313302b9c56850fc17f99e40caebce98c716
diff --git a/vendor/github.com/moby/buildkit/frontend/dockerfile/dockerfile2llb/convert.go b/vendor/github.com/moby/buildkit/frontend/dockerfile/dockerfile2llb/convert.go
index bb21476c936f5..cb6b2828f0466 100644
--- a/vendor/github.com/moby/buildkit/frontend/dockerfile/dockerfile2llb/convert.go
+++ b/vendor/github.com/moby/buildkit/frontend/dockerfile/dockerfile2llb/convert.go
@@ -345,9 +345,10 @@ func Dockerfile2LLB(ctx context.Context, dt []byte, opt ConvertOpt) (*llb.State,
 			opt.copyImage = DefaultCopyImage
 		}
 
-		if err = dispatchOnBuild(d, d.image.Config.OnBuild, opt); err != nil {
+		if err = dispatchOnBuildTriggers(d, d.image.Config.OnBuild, opt); err != nil {
 			return nil, nil, err
 		}
+		d.image.Config.OnBuild = nil
 
 		for _, cmd := range d.commands {
 			if err := dispatch(d, cmd, opt); err != nil {
@@ -586,7 +587,7 @@ type command struct {
 	sources []*dispatchState
 }
 
-func dispatchOnBuild(d *dispatchState, triggers []string, opt dispatchOpt) error {
+func dispatchOnBuildTriggers(d *dispatchState, triggers []string, opt dispatchOpt) error {
 	for _, trigger := range triggers {
 		ast, err := parser.Parse(strings.NewReader(trigger))
 		if err != nil {
diff --git a/vendor/github.com/moby/buildkit/go.mod b/vendor/github.com/moby/buildkit/go.mod
index 0d238c760ffbb..6258bee4ca163 100644
--- a/vendor/github.com/moby/buildkit/go.mod
+++ b/vendor/github.com/moby/buildkit/go.mod
@@ -53,7 +53,7 @@ require (
 	github.com/sirupsen/logrus v1.3.0
 	github.com/stretchr/testify v1.3.0
 	github.com/syndtr/gocapability v0.0.0-20180916011248-d98352740cb2 // indirect
-	github.com/tonistiigi/fsutil v0.0.0-20190819224149-3d2716dd0a4d
+	github.com/tonistiigi/fsutil v0.0.0-20191018213012-0f039a052ca1
 	github.com/tonistiigi/units v0.0.0-20180711220420-6950e57a87ea
 	github.com/uber/jaeger-client-go v0.0.0-20180103221425-e02c85f9069e
 	github.com/uber/jaeger-lib v1.2.1 // indirect
diff --git a/vendor/github.com/moby/buildkit/solver/combinedcache.go b/vendor/github.com/moby/buildkit/solver/combinedcache.go
index 07c494d1cb15c..89361bcc04d97 100644
--- a/vendor/github.com/moby/buildkit/solver/combinedcache.go
+++ b/vendor/github.com/moby/buildkit/solver/combinedcache.go
@@ -87,6 +87,9 @@ func (cm *combinedCacheManager) Load(ctx context.Context, rec *CacheRecord) (res
 			}
 		}
 	}
+	if len(results) == 0 { // TODO: handle gracefully
+		return nil, errors.Errorf("failed to load deleted cache")
+	}
 	return results[0].Result, nil
 }
 
diff --git a/vendor/github.com/moby/buildkit/util/flightcontrol/flightcontrol.go b/vendor/github.com/moby/buildkit/util/flightcontrol/flightcontrol.go
index 120be2f125559..f06d4e8954999 100644
--- a/vendor/github.com/moby/buildkit/util/flightcontrol/flightcontrol.go
+++ b/vendor/github.com/moby/buildkit/util/flightcontrol/flightcontrol.go
@@ -116,7 +116,9 @@ func newCall(fn func(ctx context.Context) (interface{}, error)) *call {
 
 func (c *call) run() {
 	defer c.closeProgressWriter()
-	v, err := c.fn(c.ctx)
+	ctx, cancel := context.WithCancel(c.ctx)
+	defer cancel()
+	v, err := c.fn(ctx)
 	c.mu.Lock()
 	c.result = v
 	c.err = err
diff --git a/vendor/github.com/tonistiigi/fsutil/diff.go b/vendor/github.com/tonistiigi/fsutil/diff.go
index acad9f4f2235d..1cbc32b30669f 100644
--- a/vendor/github.com/tonistiigi/fsutil/diff.go
+++ b/vendor/github.com/tonistiigi/fsutil/diff.go
@@ -5,6 +5,7 @@ import (
 	"hash"
 	"os"
 
+	"github.com/pkg/errors"
 	"github.com/tonistiigi/fsutil/types"
 )
 
@@ -25,9 +26,14 @@ func GetWalkerFn(root string) walkerFn {
 				return err
 			}
 
+			stat, ok := f.Sys().(*types.Stat)
+			if !ok {
+				return errors.Errorf("%T invalid file without stat information", f.Sys())
+			}
+
 			p := &currentPath{
 				path: path,
-				f:    f,
+				stat: stat,
 			}
 
 			select {
diff --git a/vendor/github.com/tonistiigi/fsutil/diff_containerd.go b/vendor/github.com/tonistiigi/fsutil/diff_containerd.go
index e63ee916a6af1..370271523bf42 100644
--- a/vendor/github.com/tonistiigi/fsutil/diff_containerd.go
+++ b/vendor/github.com/tonistiigi/fsutil/diff_containerd.go
@@ -37,12 +37,12 @@ type ChangeFunc func(ChangeKind, string, os.FileInfo, error) error
 
 type currentPath struct {
 	path string
-	f    os.FileInfo
+	stat *types.Stat
 	//	fullPath string
 }
 
 // doubleWalkDiff walks both directories to create a diff
-func doubleWalkDiff(ctx context.Context, changeFn ChangeFunc, a, b walkerFn) (err error) {
+func doubleWalkDiff(ctx context.Context, changeFn ChangeFunc, a, b walkerFn, filter FilterFunc) (err error) {
 	g, ctx := errgroup.WithContext(ctx)
 
 	var (
@@ -86,14 +86,22 @@ func doubleWalkDiff(ctx context.Context, changeFn ChangeFunc, a, b walkerFn) (er
 				continue
 			}
 
-			var f os.FileInfo
-			k, p := pathChange(f1, f2)
+			var f *types.Stat
+			var f2copy *currentPath
+			if f2 != nil {
+				statCopy := *f2.stat
+				if filter != nil {
+					filter(f2.path, &statCopy)
+				}
+				f2copy = &currentPath{path: f2.path, stat: &statCopy}
+			}
+			k, p := pathChange(f1, f2copy)
 			switch k {
 			case ChangeKindAdd:
 				if rmdir != "" {
 					rmdir = ""
 				}
-				f = f2.f
+				f = f2.stat
 				f2 = nil
 			case ChangeKindDelete:
 				// Check if this file is already removed by being
@@ -101,30 +109,30 @@ func doubleWalkDiff(ctx context.Context, changeFn ChangeFunc, a, b walkerFn) (er
 				if rmdir != "" && strings.HasPrefix(f1.path, rmdir) {
 					f1 = nil
 					continue
-				} else if rmdir == "" && f1.f.IsDir() {
+				} else if rmdir == "" && f1.stat.IsDir() {
 					rmdir = f1.path + string(os.PathSeparator)
 				} else if rmdir != "" {
 					rmdir = ""
 				}
 				f1 = nil
 			case ChangeKindModify:
-				same, err := sameFile(f1, f2)
+				same, err := sameFile(f1, f2copy)
 				if err != nil {
 					return err
 				}
-				if f1.f.IsDir() && !f2.f.IsDir() {
+				if f1.stat.IsDir() && !f2copy.stat.IsDir() {
 					rmdir = f1.path + string(os.PathSeparator)
 				} else if rmdir != "" {
 					rmdir = ""
 				}
-				f = f2.f
+				f = f2.stat
 				f1 = nil
 				f2 = nil
 				if same {
 					continue loop0
 				}
 			}
-			if err := changeFn(k, p, f, nil); err != nil {
+			if err := changeFn(k, p, &StatInfo{f}, nil); err != nil {
 				return err
 			}
 		}
@@ -159,28 +167,17 @@ func pathChange(lower, upper *currentPath) (ChangeKind, string) {
 
 func sameFile(f1, f2 *currentPath) (same bool, retErr error) {
 	// If not a directory also check size, modtime, and content
-	if !f1.f.IsDir() {
-		if f1.f.Size() != f2.f.Size() {
+	if !f1.stat.IsDir() {
+		if f1.stat.Size_ != f2.stat.Size_ {
 			return false, nil
 		}
 
-		t1 := f1.f.ModTime()
-		t2 := f2.f.ModTime()
-		if t1.UnixNano() != t2.UnixNano() {
+		if f1.stat.ModTime != f2.stat.ModTime {
 			return false, nil
 		}
 	}
 
-	ls1, ok := f1.f.Sys().(*types.Stat)
-	if !ok {
-		return false, nil
-	}
-	ls2, ok := f2.f.Sys().(*types.Stat)
-	if !ok {
-		return false, nil
-	}
-
-	return compareStat(ls1, ls2)
+	return compareStat(f1.stat, f2.stat)
 }
 
 // compareStat returns whether the stats are equivalent,
diff --git a/vendor/github.com/tonistiigi/fsutil/diskwriter.go b/vendor/github.com/tonistiigi/fsutil/diskwriter.go
index 79a1673b7877d..70323c88c9f38 100644
--- a/vendor/github.com/tonistiigi/fsutil/diskwriter.go
+++ b/vendor/github.com/tonistiigi/fsutil/diskwriter.go
@@ -194,7 +194,7 @@ func (dw *DiskWriter) HandleChange(kind ChangeKind, p string, fi os.FileInfo, er
 
 	if isRegularFile {
 		if dw.opt.AsyncDataCb != nil {
-			dw.requestAsyncFileData(p, destPath, fi)
+			dw.requestAsyncFileData(p, destPath, fi, &statCopy)
 		}
 	} else {
 		return dw.processChange(kind, p, fi, nil)
@@ -203,7 +203,7 @@ func (dw *DiskWriter) HandleChange(kind ChangeKind, p string, fi os.FileInfo, er
 	return nil
 }
 
-func (dw *DiskWriter) requestAsyncFileData(p, dest string, fi os.FileInfo) {
+func (dw *DiskWriter) requestAsyncFileData(p, dest string, fi os.FileInfo, st *types.Stat) {
 	// todo: limit worker threads
 	dw.eg.Go(func() error {
 		if err := dw.processChange(ChangeKindAdd, p, fi, &lazyFileWriter{
@@ -211,7 +211,7 @@ func (dw *DiskWriter) requestAsyncFileData(p, dest string, fi os.FileInfo) {
 		}); err != nil {
 			return err
 		}
-		return chtimes(dest, fi.ModTime().UnixNano()) // TODO: parent dirs
+		return chtimes(dest, st.ModTime) // TODO: parent dirs
 	})
 }
 
diff --git a/vendor/github.com/tonistiigi/fsutil/go.mod b/vendor/github.com/tonistiigi/fsutil/go.mod
index 0e26f72085ee9..c6485f6155cf4 100644
--- a/vendor/github.com/tonistiigi/fsutil/go.mod
+++ b/vendor/github.com/tonistiigi/fsutil/go.mod
@@ -19,7 +19,7 @@ require (
 	github.com/pkg/errors v0.8.1
 	github.com/sirupsen/logrus v1.0.3 // indirect
 	github.com/stretchr/testify v1.3.0
-	golang.org/x/crypto v0.0.0-20190129210102-0709b304e793 // indirect
+	golang.org/x/crypto v0.0.0-20180904163835-0709b304e793 // indirect
 	golang.org/x/sync v0.0.0-20180314180146-1d60e4601c6f
 	golang.org/x/sys v0.0.0-20180909124046-d0be0721c37e
 	gopkg.in/airbrake/gobrake.v2 v2.0.9 // indirect
diff --git a/vendor/github.com/tonistiigi/fsutil/receive.go b/vendor/github.com/tonistiigi/fsutil/receive.go
index 4de7ec5f0bbc6..0210dcdb1add9 100644
--- a/vendor/github.com/tonistiigi/fsutil/receive.go
+++ b/vendor/github.com/tonistiigi/fsutil/receive.go
@@ -133,7 +133,7 @@ func (r *receiver) run(ctx context.Context) error {
 		if !r.merge {
 			destWalker = GetWalkerFn(r.dest)
 		}
-		err := doubleWalkDiff(ctx, dw.HandleChange, destWalker, w.fill)
+		err := doubleWalkDiff(ctx, dw.HandleChange, destWalker, w.fill, r.filter)
 		if err != nil {
 			return err
 		}
@@ -180,11 +180,11 @@ func (r *receiver) run(ctx context.Context) error {
 					r.mu.Unlock()
 				}
 				i++
-				cp := &currentPath{path: p.Stat.Path, f: &StatInfo{p.Stat}}
-				if err := r.orderValidator.HandleChange(ChangeKindAdd, cp.path, cp.f, nil); err != nil {
+				cp := &currentPath{path: p.Stat.Path, stat: p.Stat}
+				if err := r.orderValidator.HandleChange(ChangeKindAdd, cp.path, &StatInfo{cp.stat}, nil); err != nil {
 					return err
 				}
-				if err := r.hlValidator.HandleChange(ChangeKindAdd, cp.path, cp.f, nil); err != nil {
+				if err := r.hlValidator.HandleChange(ChangeKindAdd, cp.path, &StatInfo{cp.stat}, nil); err != nil {
 					return err
 				}
 				if err := w.update(cp); err != nil {
diff --git a/vendor/github.com/tonistiigi/fsutil/types/stat.go b/vendor/github.com/tonistiigi/fsutil/types/stat.go
new file mode 100644
index 0000000000000..b79fd2bd76d42
--- /dev/null
+++ b/vendor/github.com/tonistiigi/fsutil/types/stat.go
@@ -0,0 +1,7 @@
+package types
+
+import "os"
+
+func (s Stat) IsDir() bool {
+	return os.FileMode(s.Mode).IsDir()
+}