diff --git a/api/konfig/builtinpluginconsts/commonannotations.go b/api/internal/konfig/builtinpluginconsts/commonannotations.go
similarity index 100%
rename from api/konfig/builtinpluginconsts/commonannotations.go
rename to api/internal/konfig/builtinpluginconsts/commonannotations.go
diff --git a/api/konfig/builtinpluginconsts/commonlabels.go b/api/internal/konfig/builtinpluginconsts/commonlabels.go
similarity index 100%
rename from api/konfig/builtinpluginconsts/commonlabels.go
rename to api/internal/konfig/builtinpluginconsts/commonlabels.go
diff --git a/api/konfig/builtinpluginconsts/defaultconfig.go b/api/internal/konfig/builtinpluginconsts/defaultconfig.go
similarity index 100%
rename from api/konfig/builtinpluginconsts/defaultconfig.go
rename to api/internal/konfig/builtinpluginconsts/defaultconfig.go
diff --git a/api/konfig/builtinpluginconsts/doc.go b/api/internal/konfig/builtinpluginconsts/doc.go
similarity index 100%
rename from api/konfig/builtinpluginconsts/doc.go
rename to api/internal/konfig/builtinpluginconsts/doc.go
diff --git a/api/konfig/builtinpluginconsts/images.go b/api/internal/konfig/builtinpluginconsts/images.go
similarity index 100%
rename from api/konfig/builtinpluginconsts/images.go
rename to api/internal/konfig/builtinpluginconsts/images.go
diff --git a/api/konfig/builtinpluginconsts/metadatalabels.go b/api/internal/konfig/builtinpluginconsts/metadatalabels.go
similarity index 100%
rename from api/konfig/builtinpluginconsts/metadatalabels.go
rename to api/internal/konfig/builtinpluginconsts/metadatalabels.go
diff --git a/api/konfig/builtinpluginconsts/nameprefix.go b/api/internal/konfig/builtinpluginconsts/nameprefix.go
similarity index 100%
rename from api/konfig/builtinpluginconsts/nameprefix.go
rename to api/internal/konfig/builtinpluginconsts/nameprefix.go
diff --git a/api/konfig/builtinpluginconsts/namereference.go b/api/internal/konfig/builtinpluginconsts/namereference.go
similarity index 100%
rename from api/konfig/builtinpluginconsts/namereference.go
rename to api/internal/konfig/builtinpluginconsts/namereference.go
diff --git a/api/konfig/builtinpluginconsts/namespace.go b/api/internal/konfig/builtinpluginconsts/namespace.go
similarity index 100%
rename from api/konfig/builtinpluginconsts/namespace.go
rename to api/internal/konfig/builtinpluginconsts/namespace.go
diff --git a/api/konfig/builtinpluginconsts/namesuffix.go b/api/internal/konfig/builtinpluginconsts/namesuffix.go
similarity index 100%
rename from api/konfig/builtinpluginconsts/namesuffix.go
rename to api/internal/konfig/builtinpluginconsts/namesuffix.go
diff --git a/api/konfig/builtinpluginconsts/replicas.go b/api/internal/konfig/builtinpluginconsts/replicas.go
similarity index 100%
rename from api/konfig/builtinpluginconsts/replicas.go
rename to api/internal/konfig/builtinpluginconsts/replicas.go
diff --git a/api/konfig/builtinpluginconsts/templatelabels.go b/api/internal/konfig/builtinpluginconsts/templatelabels.go
similarity index 100%
rename from api/konfig/builtinpluginconsts/templatelabels.go
rename to api/internal/konfig/builtinpluginconsts/templatelabels.go
diff --git a/api/konfig/builtinpluginconsts/varreference.go b/api/internal/konfig/builtinpluginconsts/varreference.go
similarity index 100%
rename from api/konfig/builtinpluginconsts/varreference.go
rename to api/internal/konfig/builtinpluginconsts/varreference.go
diff --git a/api/internal/plugins/builtinconfig/transformerconfig.go b/api/internal/plugins/builtinconfig/transformerconfig.go
index 69b8bd4fb..8b714d815 100644
--- a/api/internal/plugins/builtinconfig/transformerconfig.go
+++ b/api/internal/plugins/builtinconfig/transformerconfig.go
@@ -8,7 +8,7 @@ import (
 	"sort"
 
 	"sigs.k8s.io/kustomize/api/ifc"
-	"sigs.k8s.io/kustomize/api/konfig/builtinpluginconsts"
+	"sigs.k8s.io/kustomize/api/internal/konfig/builtinpluginconsts"
 	"sigs.k8s.io/kustomize/api/types"
 	"sigs.k8s.io/kustomize/kyaml/errors"
 )
diff --git a/api/testutils/kusttest/harness.go b/api/testutils/kusttest/harness.go
index c60a614a5..14543ca87 100644
--- a/api/testutils/kusttest/harness.go
+++ b/api/testutils/kusttest/harness.go
@@ -7,8 +7,8 @@ import (
 	"path/filepath"
 	"testing"
 
+	"sigs.k8s.io/kustomize/api/internal/konfig/builtinpluginconsts"
 	"sigs.k8s.io/kustomize/api/konfig"
-	"sigs.k8s.io/kustomize/api/konfig/builtinpluginconsts"
 	"sigs.k8s.io/kustomize/api/krusty"
 	"sigs.k8s.io/kustomize/api/resmap"
 	"sigs.k8s.io/kustomize/api/types"