Add opt-in configuration overrides

integrations/ckconfig/comparison_input_test.go

@@ -3,6 +3,7 @@ package ckconfig
 import (
 	"context"
 	"io"
+	"reflect"
 	"strings"
 	"testing"
 
@@ -75,7 +76,7 @@ func TestComparisonPreparation(t *testing.T) {
 	}
 	if want := (Selection{
 		Overlay: commandkit.Supplied[string]{Value: "candidate", Set: true},
-	}); input.against != want {
+	}); !reflect.DeepEqual(input.against, want) {
 		t.Fatalf("resolved right selection = %#v, want %#v", input.against, want)
 	}