diff --git a/default.nix b/default.nix
index 761a47a..6b2642e 100644
--- a/default.nix
+++ b/default.nix
@@ -6,7 +6,7 @@ pkgs.python3.pkgs.buildPythonApplication {
   pname = "nix-update";
   version = "1.5.2";
   src = ./.;
-  format = "pyproject";
+  pyproject = true;
   buildInputs = [ pkgs.makeWrapper ];
   nativeBuildInputs = [ pkgs.python3.pkgs.setuptools ];
   nativeCheckInputs = [
diff --git a/treefmt.nix b/treefmt.nix
index a6f5ab9..cbc0445 100644
--- a/treefmt.nix
+++ b/treefmt.nix
@@ -9,18 +9,17 @@
         # Used to find the project root
         projectRootFile = "flake.lock";
 
-        programs.deno.enable =
-          pkgs.lib.meta.availableOn pkgs.stdenv.hostPlatform pkgs.deno && !pkgs.deno.meta.broken;
+        programs.deno.enable = (builtins.tryEval pkgs.deno).success;
         programs.mypy.enable = true;
 
         programs.yamlfmt.enable = true;
 
-        programs.nixfmt.enable = pkgs.lib.meta.availableOn pkgs.stdenv.buildPlatform pkgs.nixfmt-rfc-style.compiler;
+        programs.nixfmt.enable = (builtins.tryEval pkgs.nixfmt-rfc-style).success;
         programs.deadnix.enable = true;
         programs.ruff.format = true;
         programs.ruff.check = true;
 
-        programs.shellcheck.enable = pkgs.lib.meta.availableOn pkgs.stdenv.buildPlatform pkgs.shellcheck.compiler;
+        programs.shellcheck.enable = (builtins.tryEval pkgs.shellcheck).success;
         programs.shfmt.enable = true;
         settings.formatter.shfmt.includes = [ "*.envrc" ];
       };