This is my first time install nix package from Arch packge manager (I follow this instruction Nix - ArchWiki).
But it show me this error warning: cannot resolve "libcpuid.so=16-64", a dependency of "nix" then nothing happen.
Arch’s forums would be better suited to this question, as this is a pacman question, not a nix one.
And if there turns out to be a packaging issue, it’d have to be reported to Arch, as they control the packaging of their packages.