I am planning on creating a rather small repo on github but I am not sure which license should I use. The project is basically a collection of bash, batch and powershell scripts. Those scripts invoke programs licensed under Mozilla Public License 2 and GPL 2 and 3. I am not using any actual open source code inside my scripts, just running programs.
My question is, does this scenario mean that I am creating a derivative work based on those programs? In this case I would have to distribute my scripts under the GPL and/or MPL. I am not sure if this is possible since GPL and MPL aren't compatible to my understanding.
I originally planned on releasing my project under the Unlicense license. Is this possible? I understand that I would need to either distribute all the source code of the programs or provide instructions on where to get them.