electrum: 4.0.6 -> 4.0.7

this release also fixes compatibility with dnspython 2.x,
so we can drop the overrides

also cryptography is required instead of pycryptodomex
(which is required only for tests now) and ecdsa dependency
is dropped completely

pkgs/applications/misc/electrum/default.nix

@@ -19,15 +19,7 @@
 }:
 
 let
-  version = "4.0.6";
-
-  # electrum is not compatible with dnspython 2.0.0 yet
-  # use the latest 1.x release instead
-  py = python3.override {
-    packageOverrides = self: super: {
-      dnspython = super.dnspython_1;
-    };
-  };
+  version = "4.0.7";
 
   libsecp256k1_name =
     if stdenv.isLinux then "libsecp256k1.so.0"
@@ -43,7 +35,7 @@ let
     owner = "spesmilo";
     repo = "electrum";
     rev = version;
-    sha256 = "0mdbg2sq56nv0hx0rrcbgrv1lv89nqc6cqigivgk665hhjm4v5kq";
+    sha256 = "06vcbj9p96d8v4xjlygzr74lqllb9adn8k0racajzq61ijb0imi2";
 
     extraPostFetch = ''
       mv $out ./all
@@ -52,13 +44,13 @@ let
   };
 in
 
-py.pkgs.buildPythonApplication {
+python3.pkgs.buildPythonApplication {
   pname = "electrum";
   inherit version;
 
   src = fetchurl {
     url = "https://download.electrum.org/${version}/Electrum-${version}.tar.gz";
-    sha256 = "0sp8p720g3rqnh52ddhaw2v4hjgpxcwbackw9qc1g9xac1q0942d";
+    sha256 = "0k5xf97ga3ixd02g1y6v84hbxd8yhvpj5iz2rhxs8wfnkfwibzh4";
   };
 
   postUnpack = ''
@@ -68,19 +60,18 @@ py.pkgs.buildPythonApplication {
 
   nativeBuildInputs = stdenv.lib.optionals enableQt [ wrapQtAppsHook ];
 
-  propagatedBuildInputs = with py.pkgs; [
+  propagatedBuildInputs = with python3.pkgs; [
     aiohttp
     aiohttp-socks
     aiorpcx
     attrs
     bitstring
+    cryptography
     dnspython
-    ecdsa
     jsonrpclib-pelix
     matplotlib
     pbkdf2
     protobuf
-    pycryptodomex
     pysocks
     qrcode
     requests
@@ -121,10 +112,15 @@ py.pkgs.buildPythonApplication {
     wrapQtApp $out/bin/electrum
   '';
 
-  checkInputs = with py.pkgs; [ pytest ];
+  checkInputs = with python3.pkgs; [ pytestCheckHook pycryptodomex ];
+
+  pytestFlagsArray = [ "electrum/tests" ];
+
+  disabledTests = [
+    "test_loop"  # test tries to bind 127.0.0.1 causing permission error
+  ];
 
-  checkPhase = ''
-    py.test electrum/tests
+  postCheck = ''
     $out/bin/electrum help >/dev/null
   '';