diff --git a/pkgs/development/tools/misc/hydra/unstable.nix b/pkgs/development/tools/misc/hydra/unstable.nix
index 0877b4991265..3d5d81452af3 100644
--- a/pkgs/development/tools/misc/hydra/unstable.nix
+++ b/pkgs/development/tools/misc/hydra/unstable.nix
@@ -43,7 +43,6 @@
 , cacert
 , glibcLocales
 , fetchFromGitHub
-, fetchpatch2
 , nixosTests
 }:
 
@@ -133,17 +132,6 @@ stdenv.mkDerivation rec {
     hash = "sha256-hIXRgu2MGqFYCALDKAiP+8lE859zftRe4OVIgGOTkvc=";
   };
 
-  patches = [
-    # hydra-eval-jobs: don't use restrict-eval for Flakes
-    # https://github.com/NixOS/hydra/pull/1257
-    # should be removed when https://github.com/NixOS/nix/pull/9547
-    # lands in the nix version used by hydra
-    (fetchpatch2 {
-      url = "https://github.com/NixOS/hydra/commit/9370b0ef977bff7e84ac07a81a0e31e75989276b.patch";
-      hash = "sha256-BRenC0lpWPgzfx42MPJBQ9VBamh5hZXuuVe6TXYKkdE=";
-    })
-  ];
-
   buildInputs = [
     unzip
     libpqxx