diff --git a/cmd/provision.go b/cmd/provision.go
index b6aaa7e..4243b7b 100644
--- a/cmd/provision.go
+++ b/cmd/provision.go
@@ -107,7 +107,7 @@ func (p provision) Run(context wisski_distillery.Context) error {
 
 	// start the container!
 	logging.LogMessage(context.IOStream, "Starting Container")
-	if err := instance.Stack().Up(context.IOStream); err != nil {
+	if err := instance.Barrel().Up(context.IOStream); err != nil {
 		return err
 	}
 
diff --git a/cmd/purge.go b/cmd/purge.go
index 60f61ca..86e61eb 100644
--- a/cmd/purge.go
+++ b/cmd/purge.go
@@ -67,7 +67,7 @@ func (p purge) Run(context wisski_distillery.Context) error {
 
 	// remove docker stack
 	logging.LogMessage(context.IOStream, "Stopping and removing docker container")
-	if err := instance.Stack().Down(context.IOStream); err != nil {
+	if err := instance.Barrel().Down(context.IOStream); err != nil {
 		context.EPrintln(err)
 	}
 
diff --git a/cmd/rebuild.go b/cmd/rebuild.go
index bf90be3..88cb704 100644
--- a/cmd/rebuild.go
+++ b/cmd/rebuild.go
@@ -42,7 +42,7 @@ func (rb rebuild) Run(context wisski_distillery.Context) error {
 	var globalErr error
 	for _, instance := range instances {
 		logging.LogOperation(func() error {
-			s := instance.Stack()
+			s := instance.Barrel()
 			if err := logging.LogOperation(func() error {
 				return s.Install(context.IOStream, component.InstallationContext{})
 			}, context.IOStream, "Installing docker stack"); err != nil {
diff --git a/cmd/reserve.go b/cmd/reserve.go
index 16a307f..997748d 100644
--- a/cmd/reserve.go
+++ b/cmd/reserve.go
@@ -63,7 +63,7 @@ func (r reserve) Run(context wisski_distillery.Context) error {
 	}
 
 	// setup docker stack
-	s := instance.ReserveStack()
+	s := instance.Reserve()
 	{
 		if err := logging.LogOperation(func() error {
 			return s.Install(context.IOStream, component.InstallationContext{})
diff --git a/go.work b/go.work
new file mode 100644
index 0000000..b7a0838
--- /dev/null
+++ b/go.work
@@ -0,0 +1,6 @@
+go 1.18
+
+use (
+	.
+	../../tkw1536/goprogram
+)
diff --git a/go.work.sum b/go.work.sum
new file mode 100644
index 0000000..1d60d83
--- /dev/null
+++ b/go.work.sum
@@ -0,0 +1,4 @@
+github.com/google/go-cmp v0.5.8/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeNGIjoY=
+golang.org/x/mod v0.6.0-dev.0.20220419223038-86c51ed26bb4/go.mod h1:jJ57K6gSWd91VN4djpZkiMVwK6gcyfeH4XE8wZrZaV4=
+golang.org/x/sys v0.0.0-20220722155257-8c9f86f7a55f/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/tools v0.1.12/go.mod h1:hNGJHUnrk76NpqgfD5Aqm5Crs+Hm0VOH/i9J2+nxYbc=
diff --git a/internal/component/instances/wisski_create.go b/internal/component/instances/wisski_create.go
index 7ff29df..412c23a 100644
--- a/internal/component/instances/wisski_create.go
+++ b/internal/component/instances/wisski_create.go
@@ -3,8 +3,12 @@ package instances
 import (
 	"errors"
 	"path/filepath"
+	"strings"
 
+	"github.com/FAU-CDI/wisski-distillery/internal/component"
 	"github.com/FAU-CDI/wisski-distillery/pkg/stringparser"
+	"github.com/alessio/shellescape"
+	"github.com/tkw1536/goprogram/stream"
 )
 
 var errInvalidSlug = errors.New("not a valid slug")
@@ -59,3 +63,55 @@ func (instances *Instances) Create(slug string) (wisski WissKI, err error) {
 	wisski.instances = instances
 	return wisski, nil
 }
+
+// Provision provisions an instance, assuming that the required databases already exist.
+func (wisski WissKI) Provision(io stream.IOStream) error {
+
+	// create the basic st!
+	st := wisski.Barrel()
+	if err := st.Install(io, component.InstallationContext{}); err != nil {
+		return err
+	}
+
+	// Pull and build the stack!
+	if err := st.Update(io, false); err != nil {
+		return err
+	}
+
+	provisionParams := []string{
+		wisski.Domain(),
+
+		wisski.SqlDatabase,
+		wisski.SqlUsername,
+		wisski.SqlPassword,
+
+		wisski.GraphDBRepository,
+		wisski.GraphDBUsername,
+		wisski.GraphDBPassword,
+
+		wisski.DrupalUsername,
+		wisski.DrupalPassword,
+
+		"", // TODO: DrupalVersion
+		"", // TODO: WissKIVersion
+	}
+
+	// escape the parameter
+	for i, param := range provisionParams {
+		provisionParams[i] = shellescape.Quote(param)
+	}
+
+	// figure out the provision script
+	// TODO: Move the provision script into the control plane!
+	provisionScript := "sudo PATH=$PATH -u www-data /bin/bash /provision_container.sh " + strings.Join(provisionParams, " ")
+
+	code, err := st.Run(io, true, "barrel", "/bin/bash", "-c", provisionScript)
+	if err != nil {
+		return err
+	}
+	if code != 0 {
+		return errors.New("unable to run provision script")
+	}
+
+	return nil
+}
diff --git a/internal/component/instances/wisski_db.go b/internal/component/instances/wisski_db.go
index cfec213..fcaa1b4 100644
--- a/internal/component/instances/wisski_db.go
+++ b/internal/component/instances/wisski_db.go
@@ -1,25 +1,7 @@
 package instances
 
 import (
-	"bytes"
-	"embed"
-	"encoding/json"
-	"errors"
-	"fmt"
-	"io"
-	"io/fs"
-	"net/url"
-	"os"
-	"path/filepath"
-	"strings"
-
 	"github.com/FAU-CDI/wisski-distillery/internal/bookkeeping"
-	"github.com/FAU-CDI/wisski-distillery/internal/component"
-	"github.com/FAU-CDI/wisski-distillery/pkg/fsx"
-	"github.com/alessio/shellescape"
-	"github.com/tkw1536/goprogram/stream"
-	"golang.org/x/exp/maps"
-	"golang.org/x/exp/slices"
 )
 
 // WissKI represents a single WissKI Instance
@@ -66,220 +48,3 @@ func (wisski *WissKI) Delete() error {
 	// delete it directly
 	return db.Delete(&wisski.Instance).Error
 }
-
-// Shell executes a shell command inside the
-func (wisski WissKI) Shell(io stream.IOStream, argv ...string) (int, error) {
-	return wisski.Stack().Exec(io, "barrel", "/bin/sh", append([]string{"/user_shell.sh"}, argv...)...)
-}
-
-// Domain returns the full domain name of this instance
-func (wisski WissKI) Domain() string {
-	return fmt.Sprintf("%s.%s", wisski.Slug, wisski.instances.Config.DefaultDomain)
-}
-
-// URL returns the public URL of this instance
-func (wisski WissKI) URL() *url.URL {
-	// setup domain and path
-	url := &url.URL{
-		Host: wisski.Domain(),
-		Path: "/",
-	}
-
-	// use http or https scheme depending on if the distillery has it enabled
-	if wisski.instances.Config.HTTPSEnabled() {
-		url.Scheme = "https"
-	} else {
-		url.Scheme = "http"
-	}
-
-	return url
-}
-
-//go:embed all:instances/barrel instances/barrel.env
-var barrelResources embed.FS
-
-// Stack represents a stack representing this instance
-func (wisski WissKI) Stack() component.Installable {
-	return component.Installable{
-		Stack: component.Stack{
-			Dir: wisski.FilesystemBase,
-		},
-
-		Resources:   barrelResources,
-		ContextPath: filepath.Join("instances", "barrel"),
-		EnvPath:     filepath.Join("instances", "barrel.env"),
-
-		EnvContext: map[string]string{
-			"DATA_PATH": filepath.Join(wisski.FilesystemBase, "data"),
-
-			"SLUG":         wisski.Slug,
-			"VIRTUAL_HOST": wisski.Domain(),
-
-			"LETSENCRYPT_HOST":  wisski.instances.Config.IfHttps(wisski.Domain()),
-			"LETSENCRYPT_EMAIL": wisski.instances.Config.IfHttps(wisski.instances.Config.CertbotEmail),
-
-			"RUNTIME_DIR":                 wisski.instances.Config.RuntimeDir(),
-			"GLOBAL_AUTHORIZED_KEYS_FILE": wisski.instances.Config.GlobalAuthorizedKeysFile,
-		},
-
-		MakeDirsPerm: fs.ModeDir | fs.ModePerm,
-		MakeDirs:     []string{"data", ".composer"},
-
-		TouchFiles: []string{
-			filepath.Join("data", "authorized_keys"),
-		},
-	}
-}
-
-//go:embed all:instances/reserve instances/reserve.env
-var reserveResources embed.FS
-
-func (wisski WissKI) ReserveStack() component.Installable {
-	return component.Installable{
-		Stack: component.Stack{
-			Dir: wisski.FilesystemBase,
-		},
-
-		Resources:   reserveResources,
-		ContextPath: filepath.Join("instances", "reserve"),
-		EnvPath:     filepath.Join("instances", "reserve.env"),
-
-		EnvContext: map[string]string{
-			"VIRTUAL_HOST": wisski.Domain(),
-
-			"LETSENCRYPT_HOST":  wisski.instances.Config.IfHttps(wisski.Domain()),
-			"LETSENCRYPT_EMAIL": wisski.instances.Config.IfHttps(wisski.instances.Config.CertbotEmail),
-		},
-	}
-}
-
-// Provision provisions an instance, assuming that the required databases already exist.
-func (wisski WissKI) Provision(io stream.IOStream) error {
-
-	// create the basic st!
-	st := wisski.Stack()
-	if err := st.Install(io, component.InstallationContext{}); err != nil {
-		return err
-	}
-
-	// Pull and build the stack!
-	if err := st.Update(io, false); err != nil {
-		return err
-	}
-
-	provisionParams := []string{
-		wisski.Domain(),
-
-		wisski.SqlDatabase,
-		wisski.SqlUsername,
-		wisski.SqlPassword,
-
-		wisski.GraphDBRepository,
-		wisski.GraphDBUsername,
-		wisski.GraphDBPassword,
-
-		wisski.DrupalUsername,
-		wisski.DrupalPassword,
-
-		"", // TODO: DrupalVersion
-		"", // TODO: WissKIVersion
-	}
-
-	// escape the parameter
-	for i, param := range provisionParams {
-		provisionParams[i] = shellescape.Quote(param)
-	}
-
-	// figure out the provision script
-	// TODO: Move the provision script into the control plane!
-	provisionScript := "sudo PATH=$PATH -u www-data /bin/bash /provision_container.sh " + strings.Join(provisionParams, " ")
-
-	code, err := st.Run(io, true, "barrel", "/bin/bash", "-c", provisionScript)
-	if err != nil {
-		return err
-	}
-	if code != 0 {
-		return errors.New("unable to run provision script")
-	}
-
-	return nil
-}
-
-// NoPrefix checks if this WissKI instance is excluded from generating prefixes
-func (wisski *WissKI) NoPrefix() bool {
-	return fsx.IsFile(filepath.Join(wisski.FilesystemBase, "prefixes.skip"))
-}
-
-var errPrefixExecFailed = errors.New("PrefixConfig: Failed to call list_uri_prefixes")
-
-// PrefixConfig returns the prefix config belonging to this instance.
-func (wisski *WissKI) PrefixConfig() (config string, err error) {
-	// if the user requested to skip the prefix, then don't do anything with it!
-	if wisski.NoPrefix() {
-		return "", nil
-	}
-
-	var builder strings.Builder
-
-	// domain
-	builder.WriteString(wisski.URL().String() + ":")
-	builder.WriteString("\n")
-
-	// default prefixes
-	wu := stream.NewIOStream(&builder, nil, nil, 0)
-	code, err := wisski.Stack().Exec(wu, "barrel", "/bin/bash", "/user_shell.sh", "-c", "drush php:script /wisskiutils/list_uri_prefixes.php")
-	if err != nil || code != 0 {
-		return "", errPrefixExecFailed
-	}
-
-	// custom prefixes
-	prefixPath := filepath.Join(wisski.FilesystemBase, "prefixes")
-	if fsx.IsFile(prefixPath) {
-		prefix, err := os.Open(prefixPath)
-		if err != nil {
-			return "", err
-		}
-		defer prefix.Close()
-		if _, err := io.Copy(&builder, prefix); err != nil {
-			return "", err
-		}
-		builder.WriteString("\n")
-	}
-
-	// and done!
-	return builder.String(), nil
-}
-
-var errPathbuildersExecFailed = errors.New("ExportPathbuilders: Failed to call export_pathbuilder")
-
-// ExportPathbuilders writes pathbuilders into the directory dest
-func (wisski *WissKI) ExportPathbuilders(dest string) error {
-	// export all the pathbuilders into the buffer
-	var buffer bytes.Buffer
-	wu := stream.NewIOStream(&buffer, nil, nil, 0)
-	code, err := wisski.Stack().Exec(wu, "barrel", "/bin/bash", "/user_shell.sh", "-c", "drush php:script /wisskiutils/export_pathbuilder.php")
-	if err != nil || code != 0 {
-		return errPathbuildersExecFailed
-	}
-
-	// decode them as a json array
-	var pathbuilders map[string]string
-	if err := json.NewDecoder(&buffer).Decode(&pathbuilders); err != nil {
-		return err
-	}
-
-	// sort the names of the pathbuilders
-	names := maps.Keys(pathbuilders)
-	slices.Sort(names)
-
-	// write each into a file!
-	for _, name := range names {
-		pbxml := []byte(pathbuilders[name])
-		name := filepath.Join(dest, fmt.Sprintf("%s.xml", name))
-		if err := os.WriteFile(name, pbxml, fs.ModePerm); err != nil {
-			return err
-		}
-	}
-
-	return nil
-}
diff --git a/internal/component/instances/wisski_exec.go b/internal/component/instances/wisski_exec.go
new file mode 100644
index 0000000..952cefe
--- /dev/null
+++ b/internal/component/instances/wisski_exec.go
@@ -0,0 +1,8 @@
+package instances
+
+import "github.com/tkw1536/goprogram/stream"
+
+// Shell executes a shell command inside the instance.
+func (wisski WissKI) Shell(io stream.IOStream, argv ...string) (int, error) {
+	return wisski.Barrel().Exec(io, "barrel", "/bin/sh", append([]string{"/user_shell.sh"}, argv...)...)
+}
diff --git a/internal/component/instances/wisski_pathbuilders.go b/internal/component/instances/wisski_pathbuilders.go
new file mode 100644
index 0000000..60edcdc
--- /dev/null
+++ b/internal/component/instances/wisski_pathbuilders.go
@@ -0,0 +1,49 @@
+package instances
+
+import (
+	"bytes"
+	"encoding/json"
+	"errors"
+	"fmt"
+	"io/fs"
+	"os"
+	"path/filepath"
+
+	"github.com/tkw1536/goprogram/stream"
+	"golang.org/x/exp/maps"
+	"golang.org/x/exp/slices"
+)
+
+var errPathbuildersExecFailed = errors.New("ExportPathbuilders: Failed to call export_pathbuilder")
+
+// ExportPathbuilders writes pathbuilders into the directory dest
+func (wisski *WissKI) ExportPathbuilders(dest string) error {
+	// export all the pathbuilders into the buffer
+	var buffer bytes.Buffer
+	wu := stream.NewIOStream(&buffer, nil, nil, 0)
+	code, err := wisski.Barrel().Exec(wu, "barrel", "/bin/bash", "/user_shell.sh", "-c", "drush php:script /wisskiutils/export_pathbuilder.php")
+	if err != nil || code != 0 {
+		return errPathbuildersExecFailed
+	}
+
+	// decode them as a json array
+	var pathbuilders map[string]string
+	if err := json.NewDecoder(&buffer).Decode(&pathbuilders); err != nil {
+		return err
+	}
+
+	// sort the names of the pathbuilders
+	names := maps.Keys(pathbuilders)
+	slices.Sort(names)
+
+	// write each into a file!
+	for _, name := range names {
+		pbxml := []byte(pathbuilders[name])
+		name := filepath.Join(dest, fmt.Sprintf("%s.xml", name))
+		if err := os.WriteFile(name, pbxml, fs.ModePerm); err != nil {
+			return err
+		}
+	}
+
+	return nil
+}
diff --git a/internal/component/instances/wisski_prefix.go b/internal/component/instances/wisski_prefix.go
new file mode 100644
index 0000000..ebaef07
--- /dev/null
+++ b/internal/component/instances/wisski_prefix.go
@@ -0,0 +1,58 @@
+package instances
+
+import (
+	"errors"
+	"io"
+	"os"
+	"path/filepath"
+	"strings"
+
+	"github.com/FAU-CDI/wisski-distillery/pkg/fsx"
+	"github.com/tkw1536/goprogram/stream"
+)
+
+// NoPrefix checks if this WissKI instance is excluded from generating prefixes.
+// TODO: Move this to the database!
+func (wisski *WissKI) NoPrefix() bool {
+	return fsx.IsFile(filepath.Join(wisski.FilesystemBase, "prefixes.skip"))
+}
+
+var errPrefixExecFailed = errors.New("PrefixConfig: Failed to call list_uri_prefixes")
+
+// PrefixConfig returns the prefix config belonging to this instance.
+func (wisski *WissKI) PrefixConfig() (config string, err error) {
+	// if the user requested to skip the prefix, then don't do anything with it!
+	if wisski.NoPrefix() {
+		return "", nil
+	}
+
+	var builder strings.Builder
+
+	// domain
+	builder.WriteString(wisski.URL().String() + ":")
+	builder.WriteString("\n")
+
+	// default prefixes
+	wu := stream.NewIOStream(&builder, nil, nil, 0)
+	code, err := wisski.Barrel().Exec(wu, "barrel", "/bin/bash", "/user_shell.sh", "-c", "drush php:script /wisskiutils/list_uri_prefixes.php")
+	if err != nil || code != 0 {
+		return "", errPrefixExecFailed
+	}
+
+	// custom prefixes
+	prefixPath := filepath.Join(wisski.FilesystemBase, "prefixes")
+	if fsx.IsFile(prefixPath) {
+		prefix, err := os.Open(prefixPath)
+		if err != nil {
+			return "", err
+		}
+		defer prefix.Close()
+		if _, err := io.Copy(&builder, prefix); err != nil {
+			return "", err
+		}
+		builder.WriteString("\n")
+	}
+
+	// and done!
+	return builder.String(), nil
+}
diff --git a/internal/component/instances/wisski_props.go b/internal/component/instances/wisski_props.go
new file mode 100644
index 0000000..d488f08
--- /dev/null
+++ b/internal/component/instances/wisski_props.go
@@ -0,0 +1,29 @@
+package instances
+
+import (
+	"fmt"
+	"net/url"
+)
+
+// Domain returns the full domain name of this WissKI
+func (wisski WissKI) Domain() string {
+	return fmt.Sprintf("%s.%s", wisski.Slug, wisski.instances.Config.DefaultDomain)
+}
+
+// URL returns the public URL of this instance
+func (wisski WissKI) URL() *url.URL {
+	// setup domain and path
+	url := &url.URL{
+		Host: wisski.Domain(),
+		Path: "/",
+	}
+
+	// use http or https scheme depending on if the distillery has it enabled
+	if wisski.instances.Config.HTTPSEnabled() {
+		url.Scheme = "https"
+	} else {
+		url.Scheme = "http"
+	}
+
+	return url
+}
diff --git a/internal/component/instances/wisski_stack.go b/internal/component/instances/wisski_stack.go
new file mode 100644
index 0000000..977bf7c
--- /dev/null
+++ b/internal/component/instances/wisski_stack.go
@@ -0,0 +1,68 @@
+package instances
+
+import (
+	"embed"
+	"io/fs"
+	"path/filepath"
+
+	"github.com/FAU-CDI/wisski-distillery/internal/component"
+)
+
+//go:embed all:instances/barrel instances/barrel.env
+var barrelResources embed.FS
+
+// Barrel returns a stack representing the running WissKI Instance
+func (wisski WissKI) Barrel() component.Installable {
+	return component.Installable{
+		Stack: component.Stack{
+			Dir: wisski.FilesystemBase,
+		},
+
+		Resources:   barrelResources,
+		ContextPath: filepath.Join("instances", "barrel"),
+		EnvPath:     filepath.Join("instances", "barrel.env"),
+
+		EnvContext: map[string]string{
+			"DATA_PATH": filepath.Join(wisski.FilesystemBase, "data"),
+
+			"SLUG":         wisski.Slug,
+			"VIRTUAL_HOST": wisski.Domain(),
+
+			"LETSENCRYPT_HOST":  wisski.instances.Config.IfHttps(wisski.Domain()),
+			"LETSENCRYPT_EMAIL": wisski.instances.Config.IfHttps(wisski.instances.Config.CertbotEmail),
+
+			"RUNTIME_DIR":                 wisski.instances.Config.RuntimeDir(),
+			"GLOBAL_AUTHORIZED_KEYS_FILE": wisski.instances.Config.GlobalAuthorizedKeysFile,
+		},
+
+		MakeDirsPerm: fs.ModeDir | fs.ModePerm,
+		MakeDirs:     []string{"data", ".composer"},
+
+		TouchFiles: []string{
+			filepath.Join("data", "authorized_keys"),
+		},
+	}
+}
+
+//go:embed all:instances/reserve instances/reserve.env
+var reserveResources embed.FS
+
+// Reserve returns a stack representing the reserve instance
+func (wisski WissKI) Reserve() component.Installable {
+	return component.Installable{
+		Stack: component.Stack{
+			Dir: wisski.FilesystemBase,
+		},
+
+		Resources:   reserveResources,
+		ContextPath: filepath.Join("instances", "reserve"),
+		EnvPath:     filepath.Join("instances", "reserve.env"),
+
+		EnvContext: map[string]string{
+			"VIRTUAL_HOST": wisski.Domain(),
+
+			"LETSENCRYPT_HOST":  wisski.instances.Config.IfHttps(wisski.Domain()),
+			"LETSENCRYPT_EMAIL": wisski.instances.Config.IfHttps(wisski.instances.Config.CertbotEmail),
+		},
+	}
+}
diff --git a/internal/component/sql/database.go b/internal/component/sql/database.go
index 31e6dea..b541139 100644
--- a/internal/component/sql/database.go
+++ b/internal/component/sql/database.go
@@ -63,7 +63,7 @@ var errSQLBackup = errors.New("SQLBackup: Mysqldump returned non-zero exit code"
 
 // Backup makes a backup of the sql database into dest.
 func (sql SQL) Backup(io stream.IOStream, dest io.Writer, database string) error {
-	io = stream.NewIOStream(dest, io.Stderr, nil, 0)
+	io = io.Streams(dest, nil, nil, 0).NonInteractive()
 
 	code, err := sql.Stack().Exec(io, "sql", "mysqldump", "--databases", database)
 	if err != nil {
diff --git a/internal/wisski/backup.go b/internal/wisski/backup.go
index 75d4ed2..f6e3c0e 100644
--- a/internal/wisski/backup.go
+++ b/internal/wisski/backup.go
@@ -211,8 +211,6 @@ func (backup *Backup) run(io stream.IOStream, dis *Distillery) {
 			return
 		}
 
-		iochild := stream.NewIOStream(io.Stderr, io.Stderr, nil, 0)
-
 		backup.InstanceSnapshots = make([]Snapshot, len(instances))
 		for i, instance := range instances {
 			backup.InstanceSnapshots[i] = func() Snapshot {
@@ -224,7 +222,7 @@ func (backup *Backup) run(io stream.IOStream, dis *Distillery) {
 				}
 
 				files <- dir
-				return dis.Snapshot(instance, iochild, SnapshotDescription{
+				return dis.Snapshot(instance, io.NonInteractive(), SnapshotDescription{
 					Dest: dir,
 				})
 			}()
diff --git a/internal/wisski/snapshot.go b/internal/wisski/snapshot.go
index 9d992d6..34e3e7f 100644
--- a/internal/wisski/snapshot.go
+++ b/internal/wisski/snapshot.go
@@ -190,7 +190,7 @@ func (dis *Distillery) Snapshot(instance instances.WissKI, io stream.IOStream, d
 // makeBlackbox runs the blackbox backup of the system.
 // It pauses the Instance, if a consistent state is required.
 func (snapshot *Snapshot) makeBlackbox(io stream.IOStream, dis *Distillery, instance instances.WissKI) {
-	stack := instance.Stack()
+	stack := instance.Barrel()
 
 	og := opgroup.NewOpGroup[string](4)