1 files changed, 3 insertions, 0 deletions
diff --git a/nixpkgs/pkgs/applications/editors/emacs-modes/cedet/default.nix b/nixpkgs/pkgs/applications/editors/emacs-modes/cedet/default.nix
index e350dc08e71c..5fbe095c4f35 100644
--- a/nixpkgs/pkgs/applications/editors/emacs-modes/cedet/default.nix
+++ b/nixpkgs/pkgs/applications/editors/emacs-modes/cedet/default.nix
@@ -44,5 +44,8 @@ stdenv.mkDerivation rec {
     license = stdenv.lib.licenses.gpl2Plus;
 
     homepage = http://cedet.sourceforge.net/;
+
+    # Fails with `semantic-idle.el:42:1:Error: Invalid function: class-p`
+    broken = true;
   };
 }