python2Packages.cryptography-vectors: pin at 2.9.2

pkgs/development/python-modules/cryptography/vectors-2.9.nix

@@ -0,0 +1,23 @@
+{ buildPythonPackage, fetchPypi, lib, cryptography }:
+
+buildPythonPackage rec {
+  pname = "cryptography_vectors";
+  # The test vectors must have the same version as the cryptography package:
+  version = cryptography.version;
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "1d4iykcv7cn9j399hczlxm5pzxmqy6d80h3j16dkjwlmv3293b4r";
+  };
+
+  # No tests included
+  doCheck = false;
+
+  meta = with lib; {
+    description = "Test vectors for the cryptography package";
+    homepage = "https://cryptography.io/en/latest/development/test-vectors/";
+    # Source: https://github.com/pyca/cryptography/tree/master/vectors;
+    license = with licenses; [ asl20 bsd3 ];
+    maintainers = with maintainers; [ primeos ];
+  };
+}

pkgs/top-level/python-packages.nix

@@ -2469,7 +2469,10 @@ in {
     else
       callPackage ../development/python-modules/cryptography { };
 
-  cryptography_vectors = callPackage ../development/python-modules/cryptography/vectors.nix { };
+  cryptography_vectors = if isPy27 then
+      callPackage ../development/python-modules/cryptography/vectors-2.9.nix { }
+    else
+      callPackage ../development/python-modules/cryptography/vectors.nix { };
 
   curtsies = callPackage ../development/python-modules/curtsies { };