Import constructor but not the data type

How do I import a constructor but not its data type? The constructor might have the name of a data type which I do not want to bring into scope.

Use case: Library (A) defines a parametrized data type (D a) which I want to use in my code (B) in instantiated form (D Int) but with the same name (D). I want to pattern match against inhabitants of type D, so I need the constructor(s) in scope.

Here is how it could look like if import lists let me specify whether I want to import a type or a constructor with name "D".

module A where

data D a = D a

module B where

import A (constructor D)
import qualified A
D = A.D Int

f :: D -> Int
f (D x) = x

Haskell has different name spaces for type and constructors, but does not let the user talk about these name spaces where it matters, namely in import/export lists. At least I found no documentation instructing me how to do this.