Use target nixos-rebuild on target machine

This is required when using a modified nixos-rebuild that crashes when
using the executable from the currently deployed system.

packages.nix

@@ -110,7 +110,10 @@ lib.attrsets.mapAttrs
           #!${pkgs.runtimeShell} -ex
           [[ $(ssh ${target} cat /etc/hostname) == ${name} ]]
           nix copy --no-check-sigs --to ssh-ng://${target} ${inputPaths}
-          ssh ${target} nixos-rebuild ${rebuildArg} "$@"
+          # use nixos-rebuild from target config
+          nixosRebuild=$(nix build ${self}#nixosConfigurations.${name}.config.system.build.nixos-rebuild --no-link --json | ${pkgs.jq}/bin/jq -r '.[0].outputs.out')
+          nix copy --no-check-sigs --to ssh-ng://${target} $nixosRebuild
+          ssh ${target} $nixosRebuild/bin/nixos-rebuild ${rebuildArg} "$@"
         '';
 
         "${name}-nixos-rebuild-hydra" = pkgs.writeScriptBin "${name}-nixos-rebuild" ''