commentaries - Why "who did not make me a goy" when Hashem told Avram he would make him a great "goy"?

There is this blessing/declaration which we recite everyday:

"Baruch Atah Adonai Eloheinu Melech Ha'Olam, shelo asani goy."

But why is it expressed this way? Why the usage of the term goy

Didn't HaShem told Avram: ואעשך לגוי גדול. I will make you a great goy? And again in Shemot 19:6 teach us that we have to become a goy kadosh? Why don't we refer to the rest of the world - in making a distinguish between ourselves and the others of this world - as amim or umot ha'olam or something like that?