diff --git a/pkgs/applications/video/mpv/scripts/buildLua.nix b/pkgs/applications/video/mpv/scripts/buildLua.nix
index 84cf6ec52ef3..8db7d4b1aa3c 100644
--- a/pkgs/applications/video/mpv/scripts/buildLua.nix
+++ b/pkgs/applications/video/mpv/scripts/buildLua.nix
@@ -53,7 +53,7 @@ lib.makeOverridable (args: stdenvNoCC.mkDerivation (extendedBy
         }
         [ ${with builtins; toString (length extraScripts)} -eq 0 ] || {
           echo "mpvScripts.buildLua does not support 'extraScripts'" \
-               "when 'scriptPath' is a directory"
+               "when 'scriptPath' is a directory" >&2
           exit 1
         }
         mkdir -p "${scriptsDir}"