Check the tl;dr section of the post. A good repack clearly states: "Based on Ren'Py 8.1.3 / Game version 0.9.5." If the version isn't listed, walk away.
However, there is no single, widely known software or game officially titled "Ren'Py Repack New." If you are referring to a specific game repack from a site like , or a specific community tool like Renpy-Repack-GUI renpy repack new
Repacking can occasionally break script references if the repacker isn't careful with file naming or directory structures. Community Perspective: Repack Tools Check the tl;dr section of the post