diff --git a/build.go b/build.go
index 246c801e..68a523b7 100644
--- a/build.go
+++ b/build.go
@@ -68,6 +68,12 @@ func (c *Config) Build(ctx context.Context, opts *Options) (context.Context, *Se
 		return ctx, nil, err
 	}
 
+	if c.CustomizeSchemas != nil {
+		if err := c.CustomizeSchemas(ctx, c.ClientGetter, r.AllSchemas); err != nil {
+			return ctx, nil, err
+		}
+	}
+
 	if c.GlobalSetup != nil {
 		ctx, err = c.GlobalSetup(ctx)
 		if err != nil {
diff --git a/types.go b/types.go
index c179fb0f..05077913 100644
--- a/types.go
+++ b/types.go
@@ -35,10 +35,11 @@ type Config struct {
 	Threadiness          int
 	K3s                  K3sConfig
 
-	GlobalSetup func(context.Context) (context.Context, error)
-	MasterSetup func(context.Context) (context.Context, error)
-	PreStart    func(context.Context) error
-	APISetup    func(context.Context, *api.Server) error
+	CustomizeSchemas func(context.Context, proxy.ClientGetter, *types.Schemas) error
+	GlobalSetup      func(context.Context) (context.Context, error)
+	MasterSetup      func(context.Context) (context.Context, error)
+	PreStart         func(context.Context) error
+	APISetup         func(context.Context, *api.Server) error
 
 	PerServerControllers []ControllerRegister
 	MasterControllers    []ControllerRegister