diff --git a/pkgs/development/python-modules/bluetooth-data-tools/default.nix b/pkgs/development/python-modules/bluetooth-data-tools/default.nix
index 918cba4f54b1..a68f8c8da430 100644
--- a/pkgs/development/python-modules/bluetooth-data-tools/default.nix
+++ b/pkgs/development/python-modules/bluetooth-data-tools/default.nix
@@ -1,6 +1,7 @@
 { lib
 , buildPythonPackage
 , fetchFromGitHub
+, cython_3
 , poetry-core
 , pytestCheckHook
 , pythonOlder
@@ -9,7 +10,7 @@
 
 buildPythonPackage rec {
   pname = "bluetooth-data-tools";
-  version = "1.6.1";
+  version = "1.7.0";
   format = "pyproject";
 
   disabled = pythonOlder "3.9";
@@ -18,10 +19,15 @@ buildPythonPackage rec {
     owner = "Bluetooth-Devices";
     repo = pname;
     rev = "refs/tags/v${version}";
-    hash = "sha256-A3zdM2kVmz8cUix9JT8cnIABZK64r6yiZisvb8A1RSQ=";
+    hash = "sha256-EmZPiZKm/80nJpPnJWhI9i4I6MhgQMifLOEUBFLqbSw=";
   };
 
+  # The project can build both an optimized cython version and an unoptimized
+  # python version. This ensures we fail if we build the wrong one.
+  env.REQUIRE_CYTHON = 1;
+
   nativeBuildInputs = [
+    cython_3
     poetry-core
     setuptools
   ];
@@ -43,7 +49,7 @@ buildPythonPackage rec {
     description = "Library for converting bluetooth data and packets";
     homepage = "https://github.com/Bluetooth-Devices/bluetooth-data-tools";
     changelog = "https://github.com/Bluetooth-Devices/bluetooth-data-tools/blob/v${version}/CHANGELOG.md";
-    license = with licenses; [ asl20 ];
+    license = licenses.asl20;
     maintainers = with maintainers; [ fab ];
   };
 }