For non-musl (so GNU libc), it's the awkwardly named gnu64. To test with the classic test package "hello": $ nix-build '<nixpkgs>' -A pkgsCross.gnu64.hell

For non-musl (so GNU libc), it's the awkwardly named gnu64. To test with the classic test package "hello": $ nix-build '<nixpkgs>' -A pkgsCross.gnu64.hello Note that since this is cross-compiled, and not native compilation, you will have to build a lot more. All "pkgsCross" systems are found in https://github.com/NixOS/nixpkgs/blob/master/lib/systems/examples.nix https://github.com/NixOS/nixpkgs/blob/master/lib/systems/exa...