diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index cfb8840931b..4842279dc50 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -15887,6 +15887,7 @@ in
           pythonBindings = true;
         };
         ruby = ruby_2_2; # see https://github.com/NixOS/nixpkgs/pull/12610#issuecomment-188666473
+        ffmpeg = ffmpeg_2; # ffmpegthumb doesn't build otherwise
       }
       ../desktops/kde-4.14;