Yeah, Hootenanny, the YouTube link I gave is from the soundtrack of the movie The Soul of a Man, and the singer on the movie soundtrack is Cassandra Wilson. The film explores the musical careers of blues musicians Skip James, Blind Willie Johnson and J. B. Lenoir. I'm guessing that the requester was mistaken, and that the song was actually the one recorded by J.B. Lenoir.

Here's a link to the Lenoir recording:

https://www.youtube.com/watch?v=ne0p9ziIT3o