diff --git a/flake.lock b/flake.lock
index d2f63a3..38da4fb 100644
--- a/flake.lock
+++ b/flake.lock
@@ -192,22 +192,6 @@
         "type": "github"
       }
     },
-    "nixos-2405": {
-      "locked": {
-        "lastModified": 1731386116,
-        "narHash": "sha256-lKA770aUmjPHdTaJWnP3yQ9OI1TigenUqVC3wweqZuI=",
-        "owner": "NixOS",
-        "repo": "nixpkgs",
-        "rev": "689fed12a013f56d4c4d3f612489634267d86529",
-        "type": "github"
-      },
-      "original": {
-        "owner": "NixOS",
-        "ref": "nixos-24.05",
-        "repo": "nixpkgs",
-        "type": "github"
-      }
-    },
     "nixos-hardware": {
       "locked": {
         "lastModified": 1731403644,
@@ -340,7 +324,6 @@
         "lanzaboote": "lanzaboote",
         "mysecrets": "mysecrets",
         "nix-darwin": "nix-darwin",
-        "nixos-2405": "nixos-2405",
         "nixos-hardware": "nixos-hardware",
         "nixos-unstable": "nixos-unstable",
         "nixpkgs": "nixpkgs_2",
diff --git a/flake.nix b/flake.nix
index fcdd618..4162d81 100644
--- a/flake.nix
+++ b/flake.nix
@@ -4,7 +4,6 @@
   inputs = {
     nixpkgs.url = "github:NixOS/nixpkgs/release-24.11";
     #nixpkgs.url = "github:NixOS/nixpkgs/nixos-24.11";
-    nixos-2405.url = "github:NixOS/nixpkgs/nixos-24.05";
     nixos-unstable.url = "github:NixOS/nixpkgs/nixos-unstable";
     nixos-hardware.url = "github:NixOS/nixos-hardware/master";
     home-manager = {
diff --git a/home/modules/packages.nix b/home/modules/packages.nix
index 32b5f33..1e23bd1 100644
--- a/home/modules/packages.nix
+++ b/home/modules/packages.nix
@@ -91,7 +91,7 @@ let
 
   nixHelpers = [
     nixpkgs-review
-    nixfmt-rfc-style
+    nixfmt
     nix-top
     statix
   ];
@@ -150,7 +150,7 @@ let
     chromium
     falkon
     thunderbird
-    inputs.nixos-unstable.legacyPackages.${system}.calibre   # FIXME: test failure in 24.11
+    #calibre   # FIXME: using bin due to failing tests
     dino
     zotero
     ding
diff --git a/home/modules/vscodium.nix b/home/modules/vscodium.nix
index 76b4c8d..2a2fa42 100644
--- a/home/modules/vscodium.nix
+++ b/home/modules/vscodium.nix
@@ -78,7 +78,7 @@
           "editor.formatOnSave" = false;
           "editor.formatOnType" = false;
         };
-        "nix.formatterPath" = lib.getExe pkgs.nixfmt-rfc-style;
+        "nix.formatterPath" = lib.getExe pkgs.nixfmt;
         "nix.enableLanguageServer" = true;
         "nix.serverPath" = lib.getExe pkgs.nixd;
         "nix.serverSettings" = { };