The nixpkgs-unstable channel's programs.sqlite was used to identify
packages producing exactly one binary, and these automatically added
to their package definitions wherever possible.
The `isCross` check is broken. When cross-compiling, it incorrectly
evaluates to false. DXVK has been building using the Meson
cross-compilation support in nixpkgs instead of with upstream’s cross
file. Instead of fixing `isCross`, just drop it as unnecessary.