If you think the words software repository and package manager are esoteric technical jargon then you don't need nix, which is completely fine. But it allows d

If you think the words software repository and package manager are esoteric technical jargon then you don't need nix, which is completely fine. But it allows developers to identically reproduce builds of a software which depends on other software packages. Other package managers may depend on some global variables of your system, which nix avoids.