diff --git a/common-headless.nix b/common-headless.nix
index 9080964..639df1b 100644
--- a/common-headless.nix
+++ b/common-headless.nix
@@ -127,6 +127,7 @@
       # LC_TIME = "en_GB.UTF-8";
       LC_PAPER = "de_AT.UTF-8";
     };
+    supportedLocales = [ "all" ]; # https://github.com/NixOS/nixpkgs/pull/177318
   };
 
   system.fsPackages = with pkgs; [
diff --git a/flake.lock b/flake.lock
index 98d5000..240487c 100644
--- a/flake.lock
+++ b/flake.lock
@@ -17,11 +17,11 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1655043425,
-        "narHash": "sha256-A+oT+aQGhW5lXy8H0cqBLsYtgcnT5glmGOXWQDcGw6I=",
+        "lastModified": 1656233237,
+        "narHash": "sha256-E6EkSxl5tXJ3e/qTWKDDya9EP2aYQ/BrtK7jI+2Myho=",
         "owner": "nixos",
         "repo": "nixpkgs",
-        "rev": "914ef51ffa88d9b386c71bdc88bffc5273c08ada",
+        "rev": "5837cc7d69a492cf87890b015a61f94682494702",
         "type": "github"
       },
       "original": {