∀ {V : Type u_1} [inst : CategoryTheory.Category.{v_1, u_1} V] {G : Type u_2} [inst_1 : Monoid G]
  [inst_2 : CategoryTheory.MonoidalCategory V] {X₁ Y₁ X₂ Y₂ : Action V G} (f : X₁ ⟶ Y₁) (g : X₂ ⟶ Y₂),
  (CategoryTheory.MonoidalCategoryStruct.tensorHom f g).hom =
    CategoryTheory.MonoidalCategoryStruct.tensorHom f.hom g.hom