diff --git a/pkgs/development/libraries/unicorn/default.nix b/pkgs/development/libraries/unicorn/default.nix
index 77947d5756b7..e9977ff75160 100644
--- a/pkgs/development/libraries/unicorn/default.nix
+++ b/pkgs/development/libraries/unicorn/default.nix
@@ -10,13 +10,13 @@
 
 stdenv.mkDerivation rec {
   pname = "unicorn";
-  version = "2.1.1";
+  version = "2.1.3";
 
   src = fetchFromGitHub {
     owner = "unicorn-engine";
     repo = "unicorn";
     tag = version;
-    hash = "sha256-ZlQ2WVTToT0OMxK6brsHnchxDwAR5n1wdtZtkTTgWV4=";
+    hash = "sha256-vBggblml+lQFhyNrfIp5GKVQ09fd+ccblKHEzWteMbI=";
   };
 
   nativeBuildInputs =
diff --git a/pkgs/development/python-modules/unicorn/default.nix b/pkgs/development/python-modules/unicorn/default.nix
index b1b630c237da..1f0fba4be262 100644
--- a/pkgs/development/python-modules/unicorn/default.nix
+++ b/pkgs/development/python-modules/unicorn/default.nix
@@ -2,6 +2,9 @@
   lib,
   stdenv,
   buildPythonPackage,
+  capstone,
+  pytestCheckHook,
+  setuptools-scm,
   setuptools,
   unicorn,
 }:
@@ -32,17 +35,18 @@ buildPythonPackage rec {
       "macosx_11_0"
     ];
 
-  build-system = [ setuptools ];
+  build-system = [
+    setuptools
+    setuptools-scm
+  ];
 
-  checkPhase = ''
-    runHook preCheck
+  nativeCheckInputs = [
+    capstone
+    pytestCheckHook
+  ];
 
-    mv unicorn unicorn.hidden
-    patchShebangs sample_*.py shellcode.py
-    sh -e sample_all.sh
-
-    runHook postCheck
-  '';
+  # this test does not appear to be intended as a pytest-style test
+  disabledTests = [ "test_i386" ];
 
   pythonImportsCheck = [ "unicorn" ];