diff --git a/pkgs/applications/networking/dropbox-cli/default.nix b/pkgs/applications/networking/dropbox-cli/default.nix
index 37e9e06ec5b2..b298b3c9df99 100644
--- a/pkgs/applications/networking/dropbox-cli/default.nix
+++ b/pkgs/applications/networking/dropbox-cli/default.nix
@@ -29,7 +29,7 @@ stdenv.mkDerivation {
     homepage = http://dropbox.com;
     description = "Command line client for the dropbox daemon.";
     license = stdenv.lib.licenses.gpl3;
-    # NOTE: 'unix' or even 'all' COULD work too, I'm not sure
+    # NOTE: Dropbox itself only works on linux, so this is ok.
     platforms = stdenv.lib.platforms.linux;
   };
 }