bump nix version

pkgs/nix-plugins-overlay.nix

@@ -1,7 +1,7 @@
 { pkgs, ... }:
 
 let
-  unpatchedNixForNixPlugins = pkgs.nixVersions.nix_2_18;
+  unpatchedNixForNixPlugins = pkgs.nixVersions.nix_2_24;
   nixForNixPlugins = unpatchedNixForNixPlugins.overrideAttrs (old: {
     patches = (old.patches or [ ]) ++ [ ./rename-nix-plugin-files.patch ];
     # some tests fail on bcachefs due to insufficient permissions
@@ -20,9 +20,9 @@ in {
       })
     ];
   });*/
-  hydra_unstable = (pkgs.hydra_unstable.override {
+  hydra = (pkgs.hydra.override {
     nix = nixForNixPlugins;
-  }).overrideAttrs (old: {
+  })/*.overrideAttrs (old: {
     version = "2023-12-01";
     # who cares about tests amirite
     doCheck = false;
@@ -30,5 +30,5 @@ in {
       rev = "4d1c8505120961f10897b8fe9a070d4e193c9a13";
       hash = "sha256-vXTuE83GL15mgZHegbllVAsVdDFcWWSayPfZxTJN5ys=";
     };
-  });
+  })*/;
 }