diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index debd4f74334..be068a6c507 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -910,7 +910,7 @@ in {
 
   blockdiag = callPackage ../development/python-modules/blockdiag { };
 
-  blockdiagcontrib-cisco = callPackage ../development/python-modules/blockdiagcontrib-cisco { };
+  blockdiagcontrib-cisco = throw "blockdiagcontrib-cisco is not compatible with blockdiag 2.0.0 and has been removed."; # Added 2020-11-29
 
   block-io = callPackage ../development/python-modules/block-io { };