diff --git a/pkgs/development/tools/mypy/default.nix b/pkgs/development/tools/mypy/default.nix
index eb6e50840a5..a68b29dee24 100644
--- a/pkgs/development/tools/mypy/default.nix
+++ b/pkgs/development/tools/mypy/default.nix
@@ -1,22 +1,24 @@
-{ stdenv, fetchurl, python35Packages }:
-python35Packages.buildPythonApplication rec {
-  name = "mypy-${version}";
-  version = "0.501";
+{ stdenv, fetchPypi, buildPythonApplication, lxml, typed-ast }:
+
+buildPythonApplication rec {
+  name = "${pname}-${version}";
+  pname = "mypy";
+  version = "0.511";
 
   # Tests not included in pip package.
   doCheck = false;
 
-  src = fetchurl {
-    url = "mirror://pypi/m/mypy/${name}.tar.gz";
-    sha256 = "164g3dq2vzxa53n9lgvmbapg41qiwcxk1w9mvzmnqksvql5vm60h";
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "1vmfyi6zh49mi7rmns5hjgpqshq7islxwsgp80j1izf82r8xgx1z";
   };
 
-  propagatedBuildInputs = with python35Packages; [ lxml typed-ast ];
+  propagatedBuildInputs = [ lxml typed-ast ];
 
   meta = with stdenv.lib; {
     description = "Optional static typing for Python";
     homepage    = "http://www.mypy-lang.org";
     license     = licenses.mit;
-    maintainers = with maintainers; [ martingms ];
+    maintainers = with maintainers; [ martingms lnl7 ];
   };
 }
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 0c39bdda0bc..45ed837d299 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -7361,7 +7361,9 @@ with pkgs;
 
   grabserial = callPackage ../development/tools/grabserial { };
 
-  mypy = callPackage ../development/tools/mypy { };
+  mypy = callPackage ../development/tools/mypy {
+    inherit (python3Packages) fetchPypi buildPythonApplication lxml typed-ast;
+  };
 
 
   ### DEVELOPMENT / LIBRARIES