Although this temple was not built or modified by Hatshepsut, stone blocks (attested to her) have been found within the foundations.
Further information can be seen on the CFEETK website.
The Ancient Egyptians were keen recyclers. As we have seen with other monuments after the time of Hatshepsut, pieces of her monuments have been re-used in later construction projects.
The biggest advantage is that often this type of recycling leads to (accidental) preservation. Away from wind, sand and man- deep within foundation trenches- these items give us valuable information many centuries after their use by Hatshepsut.