diff --git a/pkgs/applications/networking/p2p/transmission-remote-gtk/default.nix b/pkgs/applications/networking/p2p/transmission-remote-gtk/default.nix
index 5403f6e3156..968aba20754 100644
--- a/pkgs/applications/networking/p2p/transmission-remote-gtk/default.nix
+++ b/pkgs/applications/networking/p2p/transmission-remote-gtk/default.nix
@@ -11,9 +11,9 @@ stdenv.mkDerivation rec {
 
   buildInputs = [ makeWrapper pkgconfig intltool gtk3 json_glib curl ];
 
-  postInstall = ''
+  preFixup = ''
     wrapProgram "$out/bin/transmission-remote-gtk" \
-      --prefix XDG_DATA_DIRS : "${gtk3}/share"
+      --prefix XDG_DATA_DIRS : "$GSETTINGS_SCHEMAS_PATH"
   '';
 
   meta = {