diff --git a/pkgs/applications/networking/mumble/default.nix b/pkgs/applications/networking/mumble/default.nix
index 7c773b0db8ba..0de567e7a746 100644
--- a/pkgs/applications/networking/mumble/default.nix
+++ b/pkgs/applications/networking/mumble/default.nix
@@ -132,5 +132,7 @@ in {
   mumble     = client stableSource;
   mumble_git = client gitSource;
   murmur     = server stableSource;
-  murmur_git = server gitSource;
+  murmur_git = (server gitSource).overrideAttrs (old: {
+    meta = old.meta // { broken = true; };
+  });
 }