diff --git a/pkgs/development/python-modules/sendgrid/default.nix b/pkgs/development/python-modules/sendgrid/default.nix
index a9492c3e8fdf..c77bcfee3384 100644
--- a/pkgs/development/python-modules/sendgrid/default.nix
+++ b/pkgs/development/python-modules/sendgrid/default.nix
@@ -11,13 +11,13 @@
 
 buildPythonPackage rec {
   pname = "sendgrid";
-  version = "6.8.2";
+  version = "6.8.3";
 
   src = fetchFromGitHub {
     owner = pname;
     repo = "sendgrid-python";
     rev = version;
-    sha256 = "sha256-TaewVBWQ6D5TH1TGXlXVBnW7K4HS/cFxJ6bcMv2DB+c=";
+    sha256 = "sha256-kJbpYLM+GpyAHEnO2mqULOYyxIpOrmGeSMd4wJccz/8=";
   };
 
   propagatedBuildInputs = [
@@ -45,5 +45,7 @@ buildPythonPackage rec {
     homepage = "https://github.com/sendgrid/sendgrid-python";
     license = with licenses; [ mit ];
     maintainers = with maintainers; [ fab ];
+    # No support for new starkbank-ecdsa releases
+    broken = true;
   };
 }
diff --git a/pkgs/development/python-modules/starkbank-ecdsa/default.nix b/pkgs/development/python-modules/starkbank-ecdsa/default.nix
index 9d935444339a..df45883b9b05 100644
--- a/pkgs/development/python-modules/starkbank-ecdsa/default.nix
+++ b/pkgs/development/python-modules/starkbank-ecdsa/default.nix
@@ -6,18 +6,31 @@
 
 buildPythonPackage rec {
   pname = "starkbank-ecdsa";
-  version = "1.1.1";
+  version = "2.0.0";
 
   src = fetchFromGitHub {
     owner = "starkbank";
     repo = "ecdsa-python";
     rev = "v${version}";
-    sha256 = "1x86ia0385c76nzqa00qyrvnn4j174n6piq85m7ar5i0ij7qky9a";
+    sha256 = "sha256-MTd9aeX6UavRua0hnuy5qY5kltzSoyvv+LcL5EvU5Sc=";
   };
 
-  checkInputs = [ pytestCheckHook ];
-  pytestFlagsArray = [ "-v tests/*.py" ];
-  pythonImportsCheck = [ "ellipticcurve" ];
+  checkInputs = [
+    pytestCheckHook
+  ];
+
+  preCheck = ''
+    cd tests
+  '';
+
+  pytestFlagsArray = [
+    "-v"
+    "*.py"
+  ];
+
+  pythonImportsCheck = [
+    "ellipticcurve"
+  ];
 
   meta = with lib; {
     description = "Python ECDSA library";