diff --git a/api/konfig/general.go b/api/konfig/general.go
index 7c095cd35..40167bae0 100644
--- a/api/konfig/general.go
+++ b/api/konfig/general.go
@@ -32,8 +32,7 @@ const (
 	// FlagEnableKyamlDefaultValue is the default value for the --enable_kyaml
 	// flag.  This value is also used in unit tests.  See provider.DepProvider.
 	//
-	// TODO(#3304): eliminate branching on this constant.
-	// Details: https://github.com/kubernetes-sigs/kustomize/issues/3304
+	// TODO(#3588): Delete this constant.
 	//
 	// All tests should pass for either true or false values
 	// of this constant, without having to check its value.
diff --git a/api/krusty/options.go b/api/krusty/options.go
index 2c2e7de04..91d7fac05 100644
--- a/api/krusty/options.go
+++ b/api/krusty/options.go
@@ -34,6 +34,7 @@ type Options struct {
 	// Options related to kustomize plugins.
 	PluginConfig *types.PluginConfig
 
+	// TODO(#3588): Delete this field (it's always true).
 	// When true, use kyaml/ packages to manipulate KRM yaml.
 	// When false, use k8sdeps/ instead (uses k8s.io/api* packages).
 	UseKyaml bool
diff --git a/kustomize/commands/build/build.go b/kustomize/commands/build/build.go
index de749de70..82ee10dce 100644
--- a/kustomize/commands/build/build.go
+++ b/kustomize/commands/build/build.go
@@ -113,7 +113,6 @@ func NewCmdBuild(help Help, out io.Writer) *cobra.Command {
 	addFlagEnablePlugins(cmd.Flags())
 	addFlagReorderOutput(cmd.Flags())
 	addFlagEnableManagedbyLabel(cmd.Flags())
-	addFlagEnableKyaml(cmd.Flags())
 	addFlagAllowResourceIdChanges(cmd.Flags())
 
 	return cmd
@@ -152,7 +151,7 @@ func (o *Options) makeOptions() *krusty.Options {
 		opts.PluginConfig = c
 	}
 	opts.AddManagedbyLabel = isManagedbyLabelEnabled()
-	opts.UseKyaml = flagEnableKyamlValue
+	opts.UseKyaml = konfig.FlagEnableKyamlDefaultValue
 	opts.AllowResourceIdChanges = flagAllowResourceIdChangesValue
 	return opts
 }
diff --git a/kustomize/commands/build/flagEnableKyaml.go b/kustomize/commands/build/flagEnableKyaml.go
deleted file mode 100644
index d9230bac6..000000000
--- a/kustomize/commands/build/flagEnableKyaml.go
+++ /dev/null
@@ -1,22 +0,0 @@
-// Copyright 2019 The Kubernetes Authors.
-// SPDX-License-Identifier: Apache-2.0
-
-package build
-
-import (
-	"github.com/spf13/pflag"
-	"sigs.k8s.io/kustomize/api/konfig"
-)
-
-var (
-	flagEnableKyamlValue = konfig.FlagEnableKyamlDefaultValue
-)
-
-func addFlagEnableKyaml(set *pflag.FlagSet) {
-	set.BoolVar(
-		&flagEnableKyamlValue,
-		"enable_kyaml",                                   // flag name
-		konfig.FlagEnableKyamlDefaultValue,               // default value
-		"enable dependence on kyaml instead of k8sdeps.", // help
-	)
-}