Searching for this online only gives pull requests and random snippets, none of which seem to produce a system where I can run winetricks vcrun2010, wine msiexec /i ./EpicInstaller-*.msi /q and the like successfully. The basic wine and winetricks packages are broken and don’t seem to support 64-bit at all. I also tried (winetricks.override { wine = wineWowPackages.staging; }) and wineWowPackages.staging without really knowing what “staging” means in the NixOS/Wine universe, and without having ever heard of “winewow”, which only seems to be a nixpkgs concept.