chore(git-hooks): Use a fixed nixfmt that does not depend on upstream

default.nix

@@ -40,6 +40,7 @@ let
       nixfmt-rfc-style = {
         enable = true;
         stages = [ "pre-push" ];
+        package = pkgs.nixfmt-rfc-style;
       };
 
       reuse = nix-reuse.hook {
@@ -151,7 +152,6 @@ in
         src = sources.nixos-generators;
       }))
       pkgs.npins
-      pkgs.reuse
 
       # SSO testing
       pkgs.kanidm
@@ -163,7 +163,7 @@ in
       })
       (pkgs.callPackage "${sources.agenix}/pkgs/agenix.nix" { })
       (pkgs.callPackage "${sources.lon}/nix/packages/lon.nix" { })
-    ] ++ (builtins.attrValues scripts);
+    ] ++ git-checks.enabledPackages ++ (builtins.attrValues scripts);
 
     shellHook = ''
       ${git-checks.shellHook}