diff --git a/pkgs/development/python-modules/karton-mwdb-reporter/default.nix b/pkgs/development/python-modules/karton-mwdb-reporter/default.nix
index 65bb683be2b8..f976e3fedba3 100644
--- a/pkgs/development/python-modules/karton-mwdb-reporter/default.nix
+++ b/pkgs/development/python-modules/karton-mwdb-reporter/default.nix
@@ -3,17 +3,21 @@
 , fetchFromGitHub
 , karton-core
 , mwdblib
+, pythonOlder
 }:
 
 buildPythonPackage rec {
   pname = "karton-mwdb-reporter";
-  version = "1.0.1";
+  version = "unstable-2022-02-22";
+  format = "setuptools";
+
+  disabled = pythonOlder "3.7";
 
   src = fetchFromGitHub {
     owner = "CERT-Polska";
     repo = pname;
-    rev = "v${version}";
-    sha256 = "0jrn5c83nhcjny4bc879wrsgcr7mbazm51jzdkxmxyqf543cc841";
+    rev = "1afa32251b4826eac4386596b4a20f295699faec";
+    hash = "sha256-dbtIjWSNIRMccrGJspZMOBUD2EzuvW7xESlEwiOhKfQ=";
   };
 
   propagatedBuildInputs = [
@@ -21,14 +25,12 @@ buildPythonPackage rec {
     mwdblib
   ];
 
-  postPatch = ''
-    substituteInPlace requirements.txt \
-      --replace "mwdblib==3.4.0" "mwdblib"
-  '';
-
   # Project has no tests
   doCheck = false;
-  pythonImportsCheck = [ "karton.mwdb_reporter" ];
+
+  pythonImportsCheck = [
+    "karton.mwdb_reporter"
+  ];
 
   meta = with lib; {
     description = "Karton service that uploads analyzed artifacts and metadata to MWDB Core";
diff --git a/pkgs/development/python-modules/mwdblib/default.nix b/pkgs/development/python-modules/mwdblib/default.nix
index 53ca11459efe..96c3f193396e 100644
--- a/pkgs/development/python-modules/mwdblib/default.nix
+++ b/pkgs/development/python-modules/mwdblib/default.nix
@@ -8,18 +8,22 @@
 , keyring
 , python
 , python-dateutil
+, pythonOlder
 , requests
 }:
 
 buildPythonPackage rec {
   pname = "mwdblib";
-  version = "3.4.1";
+  version = "4.1.0";
+  format = "setuptools";
+
+  disabled = pythonOlder "3.7";
 
   src = fetchFromGitHub {
     owner = "CERT-Polska";
     repo = pname;
     rev = "v${version}";
-    sha256 = "sha256-jCtK3Fk725EaA26GG6j6xqEMFH4Qq92QWrJ7sxcWRaY=";
+    sha256 = "sha256-afqE6zL1uwsLNAuy5XY7OduP1e3W2ueteOOVaFJg3b0=";
   };
 
   propagatedBuildInputs = [
@@ -38,7 +42,9 @@ buildPythonPackage rec {
     runHook postCheck
   '';
 
-  pythonImportsCheck = [ "mwdblib" ];
+  pythonImportsCheck = [
+    "mwdblib"
+  ];
 
   meta = with lib; {
     description = "Python client library for the mwdb service";