diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index 8f312412878d..49783ad83c58 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -15206,14 +15206,15 @@ in {
   };
 
   pygraphviz = buildPythonPackage rec {
-    name = "pygraphviz-1.3.1";
+    name = "pygraphviz-${version}";
+    version = "1.4rc1";
 
     src = pkgs.fetchurl {
       url = "mirror://pypi/p/pygraphviz/${name}.tar.gz";
-      sha256 = "7c294cbc9d88946be671cc0d8602aac176d8c56695c0a7d871eadea75a958408";
+      sha256 = "00ck696rddjnrwfnh1zw87b9xzqfm6sqjy6kqf6kmn1xwsi6f19a";
     };
 
-    buildInputs = with self; [ doctest-ignore-unicode ];
+    buildInputs = with self; [ doctest-ignore-unicode mock nose ];
     propagatedBuildInputs = [ pkgs.graphviz pkgs.pkgconfig ];
 
     meta = {