diff --git a/pkgs/development/interpreters/python/pypy/default.nix b/pkgs/development/interpreters/python/pypy/default.nix
index 705ddb2a6f5..db7e51a51f3 100644
--- a/pkgs/development/interpreters/python/pypy/default.nix
+++ b/pkgs/development/interpreters/python/pypy/default.nix
@@ -151,5 +151,6 @@ in with passthru; stdenv.mkDerivation rec {
     license = licenses.mit;
     platforms = [ "i686-linux" "x86_64-linux" ];
     maintainers = with maintainers; [ andersk ];
+    broken = true; # TODO: Tests are failing!
   };
 }
diff --git a/pkgs/development/libraries/swiften/default.nix b/pkgs/development/libraries/swiften/default.nix
index c83f5b0f5ac..5221ef9418f 100644
--- a/pkgs/development/libraries/swiften/default.nix
+++ b/pkgs/development/libraries/swiften/default.nix
@@ -29,5 +29,6 @@ stdenv.mkDerivation rec {
     license     = licenses.gpl2Plus;
     platforms   = platforms.linux;
     maintainers = [ maintainers.twey ];
+    broken = true; # TODO: Build is failing!
   };
 }