diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 27b31c27..d8b41162 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -11,7 +11,7 @@ jobs:
   graalvm:
     strategy:
       matrix:
-        os: [ubuntu-latest, macos-15-intel, macos-14]
+        os: [ubuntu-latest, macos-14]
     runs-on: ${{ matrix.os }}
     steps:
     - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
@@ -45,7 +45,7 @@ jobs:
     name: Nix ❄
     strategy:
       matrix:
-        os: [ubuntu-latest, macos-15-intel, macos-14]
+        os: [ubuntu-latest, macos-14]
     runs-on: ${{ matrix.os }}
     steps:
     - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
diff --git a/flake.lock b/flake.lock
index bc792608..e26f54b0 100644
--- a/flake.lock
+++ b/flake.lock
@@ -110,16 +110,16 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1779796641,
-        "narHash": "sha256-ZsIrKmhp4vbBXoXXmR/tBXA/UCsAQiJL9vsgZEduhVY=",
+        "lastModified": 1780734595,
+        "narHash": "sha256-DmTfP92QFYRLOGXlMIE54MAgxSJjDWocl3gRNOu72Os=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "25f538306313eae3927264466c70d7001dcea1df",
+        "rev": "9b696460ac78b5ccfc17c854d8c976f20456e943",
         "type": "github"
       },
       "original": {
         "owner": "NixOS",
-        "ref": "nixos-25.11",
+        "ref": "nixos-26.05",
         "repo": "nixpkgs",
         "type": "github"
       }
diff --git a/flake.nix b/flake.nix
index f59b2203..abbac616 100644
--- a/flake.nix
+++ b/flake.nix
@@ -2,7 +2,7 @@
   description = "scalals";
 
   inputs = {
-    nixpkgs.url = "github:NixOS/nixpkgs/nixos-25.11";
+    nixpkgs.url = "github:NixOS/nixpkgs/nixos-26.05";
     nix-filter.url = "github:numtide/nix-filter";
     flake-compat = {
       url = "github:edolstra/flake-compat";
@@ -144,7 +144,7 @@
           ];
         in
         {
-          formatter = pkgs.nixfmt-rfc-style;
+          formatter = pkgs.nixfmt;
 
           packages = rec {
             inherit (pkgs) scalafmt;
@@ -233,7 +233,7 @@
                 nix-fmt = {
                   enable = true;
                   name = "nix fmt";
-                  entry = "${pkgs.nixfmt-rfc-style}/bin/nixfmt";
+                  entry = "${pkgs.nixfmt}/bin/nixfmt";
                   types = [ "nix" ];
                 };
                 scalafmt = {