realised that rustfmt nightly is in nixpkgs already lol :3

flake.nix

@@ -85,11 +85,6 @@
       };
     };
 
-    fenix = {
-      url = "github:nix-community/fenix";
-      inputs.nixpkgs.follows = "nixpkgs-unstable";
-    };
-
     # temp theme until i bother creating my own </3
     sddm-silent = {
       url = "github:uiriansan/SilentSDDM";

homes/modules/programs/neovim/nixcats.nix

@@ -67,7 +67,7 @@ in {
             rust = {
               lsp = [cargo mpkgs.rust-analyzer];
               # nightly rustfmt has nicer features :3
-              format = [inputs.fenix.packages.${system}.complete.rustfmt];
+              format = [(rustfmt.override {asNightly = true;})];
             };
             zig = {
               lsp = [zls];