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-rw-r--r--pkgs/applications/networking/gns3/server.nix2
1 files changed, 1 insertions, 1 deletions
diff --git a/pkgs/applications/networking/gns3/server.nix b/pkgs/applications/networking/gns3/server.nix
index 5a201dfc4074..1bc8e4c15d11 100644
--- a/pkgs/applications/networking/gns3/server.nix
+++ b/pkgs/applications/networking/gns3/server.nix
@@ -20,7 +20,7 @@ let
       }));
   yarl = (stdenv.lib.overrideDerivation pythonPackages.yarl
     (oldAttrs:
-      { propagatedBuildInputs = [ multidict_3_1_3 ]; }));
+      { propagatedBuildInputs = [ multidict_3_1_3 pythonPackages.idna ]; }));
   aiohttp = (stdenv.lib.overrideDerivation pythonPackages.aiohttp
     (oldAttrs:
       rec {