flake: bump all dependencies

nixpkgs: 2026-01-01T05:40:00+01:00 -> 2026-05-29T07:01:12+02:00
rust-overlay: 2026-01-01T03:53:20+01:00 -> 2026-05-31T05:19:49+02:00

This commit was generated via:
nix run github:phip1611/nixos-configs#flake-update-and-commit

flake.lock

@@ -2,11 +2,11 @@
   "nodes": {
     "nixpkgs": {
       "locked": {
-        "lastModified": 1767242400,
-        "narHash": "sha256-knFaYjeg7swqG1dljj1hOxfg39zrIy8pfGuicjm9s+o=",
+        "lastModified": 1780030872,
+        "narHash": "sha256-u6WU/yd/o8iYQrHX3RAwO1hYa3LkoSL+WNQD0rJfJZQ=",
         "owner": "nixos",
         "repo": "nixpkgs",
-        "rev": "c04833a1e584401bb63c1a63ddc51a71e6aa457a",
+        "rev": "e9a7635a57597d9754eccebdfc7045e6c8600e6b",
         "type": "github"
       },
       "original": {
@@ -43,11 +43,11 @@
         "nixpkgs": "nixpkgs_2"
       },
       "locked": {
-        "lastModified": 1767236000,
-        "narHash": "sha256-l4ftzyoD7XX0biEoTEwhOkFhvHhmggkVQyl2jEES0so=",
+        "lastModified": 1780197589,
+        "narHash": "sha256-FVCr2Ij/jKf59a4LW481eeOF6rJRreOBrVgW/aUBTrw=",
         "owner": "oxalica",
         "repo": "rust-overlay",
-        "rev": "2be15c4abeba7ade2cf9bc4c17ab310441e533b9",
+        "rev": "21632e942d89bf1cce4e5a63d7e58a215a0cbfcc",
         "type": "github"
       },
       "original": {

flake.nix

@@ -36,7 +36,7 @@
       devShells = forAllSystems (pkgs: {
         default = pkgs.mkShell {
           packages = with pkgs; [
-            nixfmt-rfc-style
+            nixfmt
 
             # Integration test dependencies
             swtpm
@@ -58,6 +58,6 @@
           # OVMF_SHELL="${pkgs.edk2-uefi-shell}";
         };
       });
-      formatter = forAllSystems (pkgs: pkgs.nixfmt-rfc-style);
+      formatter = forAllSystems (pkgs: pkgs.treefmt-nix);
     };
 }