diff --git a/pkgs/development/compilers/gcc/4.5/default.nix b/pkgs/development/compilers/gcc/4.5/default.nix
index c63867a1d2db..1eebd5af60d1 100644
--- a/pkgs/development/compilers/gcc/4.5/default.nix
+++ b/pkgs/development/compilers/gcc/4.5/default.nix
@@ -417,6 +417,7 @@ stdenv.mkDerivation ({
     # gnatboot is not available out of linux platforms, so we disable the darwin build
     # for the gnat (ada compiler).
     platforms = stdenv.lib.platforms.linux ++ optionals (langAda == false) [ "i686-darwin" ];
+    broken = langAda;
   };
 }