diff --git a/pkgs/development/compilers/blackdown/default.nix b/pkgs/development/compilers/blackdown/default.nix
index 43ed19a1098..b83c3124e8a 100644
--- a/pkgs/development/compilers/blackdown/default.nix
+++ b/pkgs/development/compilers/blackdown/default.nix
@@ -6,4 +6,4 @@ if stdenv.system == "i686-linux"
       inherit stdenv fetchurl;
     }
   else
-    false
+    null
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index c720f94257f..4d95325c1e0 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -1887,9 +1887,8 @@ rec {
     plugins = [
       MPlayerPlugin
       flashplayer
-      blackdown
 #      RealPlayer  # disabled by default for legal reasons
-    ];
+    ] ++ (if blackdown != null then [blackdown] else []);
   };
 
   firefoxWrapper = wrapFirefox firefox;