diff --git a/flake.lock b/flake.lock
index b1c8b87..8766dea 100644
--- a/flake.lock
+++ b/flake.lock
@@ -36,11 +36,11 @@
     "lix": {
       "flake": false,
       "locked": {
-        "lastModified": 1726590994,
-        "narHash": "sha256-CrvIEzBzvvfE7jGIXBv6hSYDxv4eYeHWAwVho5WrF48=",
-        "rev": "8ab5743904a06c78153281bf61b3aa8aa451a489",
+        "lastModified": 1727712632,
+        "narHash": "sha256-7kaZRZCWG8PmxwIDTVKjJo3VtAGDun7mqfAMlucQbdQ=",
+        "rev": "a16ceb9411c57993d811c6bebb517742fe3d34e3",
         "type": "tarball",
-        "url": "https://git.lix.systems/api/v1/repos/lix-project/lix/archive/8ab5743904a06c78153281bf61b3aa8aa451a489.tar.gz?rev=8ab5743904a06c78153281bf61b3aa8aa451a489"
+        "url": "https://git.lix.systems/api/v1/repos/lix-project/lix/archive/a16ceb9411c57993d811c6bebb517742fe3d34e3.tar.gz?rev=a16ceb9411c57993d811c6bebb517742fe3d34e3"
       },
       "original": {
         "type": "tarball",
@@ -49,11 +49,11 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1726463316,
-        "narHash": "sha256-gI9kkaH0ZjakJOKrdjaI/VbaMEo9qBbSUl93DnU7f4c=",
+        "lastModified": 1727634051,
+        "narHash": "sha256-S5kVU7U82LfpEukbn/ihcyNt2+EvG7Z5unsKW9H/yFA=",
         "owner": "nixos",
         "repo": "nixpkgs",
-        "rev": "99dc8785f6a0adac95f5e2ab05cc2e1bf666d172",
+        "rev": "06cf0e1da4208d3766d898b7fdab6513366d45b9",
         "type": "github"
       },
       "original": {
diff --git a/flake.nix b/flake.nix
index 887e561..72245f3 100644
--- a/flake.nix
+++ b/flake.nix
@@ -47,7 +47,7 @@
       {
         inherit pkgs;
         packages = {
-          default = pkgs.nixVersions.nix_2_18;
+          default = pkgs.nix;
           inherit (pkgs) nix-doc nix-eval-jobs;
         };
 
@@ -57,6 +57,7 @@
 
         checks = {
           inherit (self.packages.${system}) default nix-eval-jobs;
+          inherit (pkgs) nixos-option;
         } // lib.optionalAttrs (lib.elem system linux64BitSystems) {
           # wrongMajor intentionally not included here since it is expected to fail
           inherit (self.nixosTests.${system}) it-builds;