diff --git a/default.nix b/default.nix
index 9ffc0c3..6b2642e 100644
--- a/default.nix
+++ b/default.nix
@@ -2,15 +2,15 @@
   pkgs ? import <nixpkgs> { },
 }:
 
-pkgs.python311.pkgs.buildPythonApplication {
+pkgs.python3.pkgs.buildPythonApplication {
   pname = "nix-update";
-  version = "1.0.0";
+  version = "1.5.2";
   src = ./.;
-  format = "pyproject";
+  pyproject = true;
   buildInputs = [ pkgs.makeWrapper ];
-  nativeBuildInputs = [ pkgs.python311.pkgs.setuptools ];
+  nativeBuildInputs = [ pkgs.python3.pkgs.setuptools ];
   nativeCheckInputs = [
-    pkgs.python311.pkgs.pytest
+    pkgs.python3.pkgs.pytest
     # technically not test inputs, but we need it for development in PATH
     pkgs.nixVersions.stable
     pkgs.nix-prefetch-git
@@ -22,12 +22,9 @@ pkgs.python311.pkgs.buildPythonApplication {
     "--prefix PATH"
     ":"
     (pkgs.lib.makeBinPath [
-      pkgs.nixVersions.stable or pkgs.nix_2_4
+      pkgs.nixVersions.stable
       pkgs.nixpkgs-review
       pkgs.nix-prefetch-git
     ])
   ];
-  shellHook = ''
-    # workaround because `python setup.py develop` breaks for me
-  '';
 }
diff --git a/flake.lock b/flake.lock
index d88499a..e72ce0f 100644
--- a/flake.lock
+++ b/flake.lock
@@ -7,11 +7,11 @@
         ]
       },
       "locked": {
-        "lastModified": 1726153070,
-        "narHash": "sha256-HO4zgY0ekfwO5bX0QH/3kJ/h4KvUDFZg8YpkNwIbg1U=",
+        "lastModified": 1730504689,
+        "narHash": "sha256-hgmguH29K2fvs9szpq2r3pz2/8cJd2LPS+b4tfNFCwE=",
         "owner": "hercules-ci",
         "repo": "flake-parts",
-        "rev": "bcef6817a8b2aa20a5a6dbb19b43e63c5bf8619a",
+        "rev": "506278e768c2a08bec68eb62932193e341f55c90",
         "type": "github"
       },
       "original": {
@@ -22,11 +22,11 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1727617520,
-        "narHash": "sha256-uNfh3aMyCekMpjtL/PZtl2Hz/YqNuUpCBEzVxt1QYck=",
+        "lastModified": 1730958623,
+        "narHash": "sha256-JwQZIGSYnRNOgDDoIgqKITrPVil+RMWHsZH1eE1VGN0=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "7eee17a8a5868ecf596bbb8c8beb527253ea8f4d",
+        "rev": "85f7e662eda4fa3a995556527c87b2524b691933",
         "type": "github"
       },
       "original": {
@@ -50,11 +50,11 @@
         ]
       },
       "locked": {
-        "lastModified": 1727431250,
-        "narHash": "sha256-uGRlRT47ecicF9iLD1G3g43jn2e+b5KaMptb59LHnvM=",
+        "lastModified": 1730321837,
+        "narHash": "sha256-vK+a09qq19QNu2MlLcvN4qcRctJbqWkX7ahgPZ/+maI=",
         "owner": "numtide",
         "repo": "treefmt-nix",
-        "rev": "879b29ae9a0378904fbbefe0dadaed43c8905754",
+        "rev": "746901bb8dba96d154b66492a29f5db0693dbfcc",
         "type": "github"
       },
       "original": {
diff --git a/treefmt.nix b/treefmt.nix
index a6f5ab9..4e51958 100644
--- a/treefmt.nix
+++ b/treefmt.nix
@@ -10,17 +10,17 @@
         projectRootFile = "flake.lock";
 
         programs.deno.enable =
-          pkgs.lib.meta.availableOn pkgs.stdenv.hostPlatform pkgs.deno && !pkgs.deno.meta.broken;
+          pkgs.hostPlatform.system != "x86_64-darwin" && pkgs.hostPlatform.system != "riscv64-linux";
         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 = pkgs.hostPlatform.system != "riscv64-linux";
         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 = pkgs.hostPlatform.system != "riscv64-linux";
         programs.shfmt.enable = true;
         settings.formatter.shfmt.includes = [ "*.envrc" ];
       };