diff --git a/flake.nix b/flake.nix
index 19b1fe16..bed4da02 100644
--- a/flake.nix
+++ b/flake.nix
@@ -90,7 +90,7 @@
     flake-utils.url = "github:numtide/flake-utils";
     # TODO: drop when switching to 23.05 and check if treefmt-nix is still used
     harmonia = {
-      url = "github:nix-community/harmonia";
+      url = "github:SuperSandro2000/harmonia/flake-lock";
       inputs = {
         flake-parts.follows = "flake-parts";
         nixpkgs.follows = "nixos";
@@ -285,7 +285,7 @@
       };
     in {
       overlays = import ./overlays {
-        inherit (inputs) tracer bevy-mandelbrot bevy-julia;
+        inherit (inputs) bevy-julia bevy-mandelbrot harmonia tracer;
       };
 
       legacyPackages = lib.attrsets.mapAttrs (_: pkgs: pkgs.appendOverlays overlayList) nixos.legacyPackages;
diff --git a/overlays/default.nix b/overlays/default.nix
index e6bffb01..9bef3115 100644
--- a/overlays/default.nix
+++ b/overlays/default.nix
@@ -1,5 +1,6 @@
 {  bevy-julia
 , bevy-mandelbrot
+, harmonia
 , tracer
 }:
 
@@ -35,6 +36,8 @@ with final; {
     commandLineArgs = "--enable-features=VaapiVideoEncoder,VaapiVideoDecoder,CanvasOopRasterization --force-dark-mode";
   };
 
+  harmonia = harmonia.packages.${system}.harmonia.override { pkgs = prev // { rustPlatform = rustPackages_1_66.rustPlatform; }; };
+
   # hydra flake
   hydra = prev.hydra.overrideAttrs (oldAttrs: {
     patches = oldAttrs.patches or [ ] ++ [