diff --git a/overlay/default.nix b/overlay/default.nix
index 5e68597d..c4d9a5ea 100644
--- a/overlay/default.nix
+++ b/overlay/default.nix
@@ -3,19 +3,39 @@ final: prev:
 {
   bmxd = prev.callPackage ./bmxd.nix { };
 
+  dump1090-influxdb = import ./dump1090-influxdb { pkgs = prev; };
+
+  dump1090_rs = prev.callPackage ./dump1090_rs.nix { };
+
+  # hydra flake
+  hydra = prev.hydra.overrideAttrs (oldAttrs: {
+    patches = oldAttrs.patches or [ ] ++ [
+      (fetchpatch {
+        url = "https://github.com/NixOS/hydra/pull/1227/commits/750978a19232583e17620a1bd80435e957e7213a.patch";
+        sha256 = "sha256-86Li0YUSVUdnw6lt6kZ56ohDRKPD13SZzukqPU1np8U=";
+      })
+    ];
+  });
+
+  # hydra in nixpkgs
+  hydra_unstable = prev.hydra_unstable.overrideAttrs (oldAttrs: {
+    patches = oldAttrs.patches or [ ] ++ [
+      (fetchpatch {
+        url = "https://github.com/NixOS/hydra/pull/1227/commits/750978a19232583e17620a1bd80435e957e7213a.patch";
+        sha256 = "sha256-86Li0YUSVUdnw6lt6kZ56ohDRKPD13SZzukqPU1np8U=";
+      })
+    ];
+  });
+
+  mlat-client = prev.python3Packages.callPackage ./mlat-client.nix { };
+
   pile = prev.callPackage ./pile.nix { };
 
   pi-sensors = prev.callPackage ./pi-sensors { };
 
-  dump1090-influxdb = import ./dump1090-influxdb { pkgs = prev; };
-
-  mlat-client = prev.python3Packages.callPackage ./mlat-client.nix { };
+  plume = prev.callPackage ./plume { };
 
   readsb = prev.callPackage ./readsb.nix { };
 
-  dump1090_rs = prev.callPackage ./dump1090_rs.nix { };
-
-  plume = prev.callPackage ./plume { };
-
   SimpleYggGen-CPP = prev.callPackage ./simpleygggen.nix { };
 }