Person puts short shell scripts "build", "deploy" and "dev" in a single makefile as targets, instead of putting each script in a separate well named file. Then concludes that make is a great build tool as long as you don't use it as a build tool ("nothing complicated").
Please do not do this. make is not a shell. Also, consider reading (and writing) build docs, instead of running make with random targets as soon as you see a makefile