CC BY-NC-SA does not permit the use of the software for commercial purposes. This violates point 6 of the Open Source Definition[OSD] that says, "No Discrimination Against Fields of Endeavor: The license must not restrict anyone from making use of the program in a specific field of endeavor. For example, it may not restrict the program from being used in a business, or from being used for genetic research."
[OSD]: https://opensource.org/docs/osd