diff --git a/cmd/mbf/main.go b/cmd/mbf/main.go
index 1a03757..62588a3 100644
--- a/cmd/mbf/main.go
+++ b/cmd/mbf/main.go
@@ -477,17 +477,19 @@ func main() {
 			"shell",
 			"Interactive shell in the specified Rosa OS environment",
 			func(args []string) error {
-				root := make([]pkg.Artifact, 0, 6+len(args))
-				for _, arg := range args {
+				presets := make([]rosa.PArtifact, len(args))
+				for i, arg := range args {
 					p, ok := rosa.ResolveName(arg)
 					if !ok {
 						return fmt.Errorf("unknown artifact %q", arg)
 					}
-					root = append(root, rosa.Std.Load(p))
+					presets[i] = p
 				}
+				root := make(rosa.Collect, 0, 6+len(args))
+				root = rosa.Std.AppendPresets(root, presets...)
 
 				if flagWithToolchain {
-					musl, compilerRT, runtimes, clang := rosa.Std.NewLLVM()
+					musl, compilerRT, runtimes, clang := (rosa.Std - 1).NewLLVM()
 					root = append(root, musl, compilerRT, runtimes, clang)
 				} else {
 					root = append(root, rosa.Std.Load(rosa.Musl))
@@ -497,6 +499,12 @@ func main() {
 					rosa.Std.Load(rosa.Toybox),
 				)
 
+				if _, _, err := cache.Cure(&root); err == nil {
+					return errors.New("unreachable")
+				} else if !errors.Is(err, rosa.Collected{}) {
+					return err
+				}
+
 				type cureRes struct {
 					pathname *check.Absolute
 					checksum unique.Handle[pkg.Checksum]