diff --git a/dagger/client.go b/dagger/client.go
index b2b00fbd..3737620f 100644
--- a/dagger/client.go
+++ b/dagger/client.go
@@ -203,8 +203,7 @@ func (c *Client) buildfn(ctx context.Context, ch chan *bk.SolveStatus, w io.Writ
 	// Call buildkit solver
 	resp, err := c.c.Build(ctx, opts, "", Compute, ch)
 	if err != nil {
-		err = errors.New(bkCleanError(err.Error()))
-		return errors.Wrap(err, "buildkit solve")
+		return errors.Wrap(bkCleanError(err), "buildkit solve")
 	}
 	for k, v := range resp.ExporterResponse {
 		// FIXME consume exporter response
@@ -305,7 +304,7 @@ func (n Node) LogError(ctx context.Context, errmsg string) {
 		Ctx(ctx).
 		Error().
 		Str("path", n.ComponentPath().String()).
-		Msg(bkCleanError(errmsg))
+		Msg(errmsg)
 }
 
 func (c *Client) printfn(ctx context.Context, ch chan *bk.SolveStatus) error {
@@ -362,21 +361,6 @@ func (c *Client) printfn(ctx context.Context, ch chan *bk.SolveStatus) error {
 	}
 }
 
-// A helper to remove noise from buildkit error messages.
-// FIXME: Obviously a cleaner solution would be nice.
-func bkCleanError(msg string) string {
-	noise := []string{
-		"executor failed running ",
-		"buildkit-runc did not terminate successfully",
-		"rpc error: code = Unknown desc =",
-		"failed to solve: ",
-	}
-	for _, s := range noise {
-		msg = strings.Replace(msg, s, "", -1)
-	}
-	return msg
-}
-
 func (c *Client) dockerprintfn(ctx context.Context, ch chan *bk.SolveStatus, out io.Writer) error {
 	var cons console.Console
 	// FIXME: use smarter writer from blr
diff --git a/dagger/fs.go b/dagger/fs.go
index 99e70337..5e54a9e6 100644
--- a/dagger/fs.go
+++ b/dagger/fs.go
@@ -4,9 +4,11 @@ import (
 	"context"
 	"os"
 	"path"
+	"strings"
 
 	"github.com/moby/buildkit/client/llb"
 	bkgw "github.com/moby/buildkit/frontend/gateway/client"
+	"github.com/pkg/errors"
 	fstypes "github.com/tonistiigi/fsutil/types"
 )
 
@@ -37,7 +39,7 @@ func (fs *FS) solve(ctx context.Context) error {
 	}
 	output, err := fs.s.Solve(ctx, fs.input)
 	if err != nil {
-		return err
+		return bkCleanError(err)
 	}
 	fs.output = output
 	return nil
@@ -54,7 +56,11 @@ func (fs FS) ReadFile(ctx context.Context, filename string) ([]byte, error) {
 		return nil, os.ErrNotExist
 	}
 
-	return fs.output.ReadFile(ctx, bkgw.ReadRequest{Filename: filename})
+	contents, err := fs.output.ReadFile(ctx, bkgw.ReadRequest{Filename: filename})
+	if err != nil {
+		return nil, bkCleanError(err)
+	}
+	return contents, nil
 }
 
 func (fs FS) ReadDir(ctx context.Context, dir string) ([]Stat, error) {
@@ -72,7 +78,7 @@ func (fs FS) ReadDir(ctx context.Context, dir string) ([]Stat, error) {
 		Path: dir,
 	})
 	if err != nil {
-		return nil, err
+		return nil, bkCleanError(err)
 	}
 	out := make([]Stat, len(st))
 	for i := range st {
@@ -150,3 +156,22 @@ func (fs FS) Result(ctx context.Context) (*bkgw.Result, error) {
 	res.SetRef(ref)
 	return res, nil
 }
+
+// A helper to remove noise from buildkit error messages.
+// FIXME: Obviously a cleaner solution would be nice.
+func bkCleanError(err error) error {
+	noise := []string{
+		"executor failed running ",
+		"buildkit-runc did not terminate successfully",
+		"rpc error: code = Unknown desc =",
+		"failed to solve: ",
+	}
+
+	msg := err.Error()
+
+	for _, s := range noise {
+		msg = strings.Replace(msg, s, "", -1)
+	}
+
+	return errors.New(msg)
+}
diff --git a/dagger/solver.go b/dagger/solver.go
index 08d4d45f..00790210 100644
--- a/dagger/solver.go
+++ b/dagger/solver.go
@@ -47,7 +47,7 @@ func (s Solver) Solve(ctx context.Context, st llb.State) (bkgw.Reference, error)
 		Evaluate: true,
 	})
 	if err != nil {
-		return nil, err
+		return nil, bkCleanError(err)
 	}
 	// always use single reference (ignore multiple outputs & metadata)
 	return res.SingleRef()