libunwind.supportsHost is not available on darwin because it uses a different libunwind package (https://github.com/NixOS/nixpkgs/blob/master/pkgs/os-specific/darwin/apple-source-releases/default.nix#L270) and changing the stdenv is a big overkill.
libunwind.supportsHost is not available on darwin because it uses a different libunwind package (https://github.com/NixOS/nixpkgs/blob/master/pkgs/os-specific/darwin/apple-source-releases/default.nix#L270) and changing the stdenv is a big overkill.