diff --git a/pkgs/development/python-modules/picobox/default.nix b/pkgs/development/python-modules/picobox/default.nix
index de0bdb14725b2..176c86e84f079 100644
--- a/pkgs/development/python-modules/picobox/default.nix
+++ b/pkgs/development/python-modules/picobox/default.nix
@@ -3,15 +3,17 @@
 , fetchFromGitHub
 , fetchpatch
 , flask
+, hatchling
+, hatch-vcs
 , isPy27
 , pytestCheckHook
-, pythonAtLeast
-, setuptools-scm
 }:
 
 buildPythonPackage rec {
   pname = "picobox";
-  version = "2.2.0";
+  version = "3.0.0";
+
+  format = "pyproject";
 
   disabled = isPy27;
 
@@ -19,26 +21,14 @@ buildPythonPackage rec {
     owner = "ikalnytskyi";
     repo = pname;
     rev = "refs/tags/${version}";
-    hash = "sha256-B2A8GMhBFU/mb/JiiqtP+HvpPj5FYwaYO3gQN2QI6z0=";
+    hash = "sha256-LQiSurL+eFRJ9iQheoo66o44BlfBtAatk8deuMFROcc=";
   };
 
-  patches = [
-    (fetchpatch {
-      # already in master, but no new release yet.
-      # https://github.com/ikalnytskyi/picobox/issues/55
-      url = "https://github.com/ikalnytskyi/picobox/commit/1fcc4a0c26a7cd50ee3ef6694139177b5dfb2be0.patch";
-      hash = "sha256-/NIEzTFlZ5wG7jHT/YdySYoxT/UhSk29Up9/VqjG/jg=";
-      includes = [
-        "tests/test_box.py"
-        "tests/test_stack.py"
-      ];
-    })
-  ];
-
   SETUPTOOLS_SCM_PRETEND_VERSION = version;
 
   nativeBuildInputs = [
-    setuptools-scm
+    hatchling
+    hatch-vcs
   ];
 
   nativeCheckInputs = [