diff --git a/pkgs/desktops/plasma-5.5/default.nix b/pkgs/desktops/plasma-5.5/default.nix
index c9fcbdd8e6a..bbac6ab3524 100644
--- a/pkgs/desktops/plasma-5.5/default.nix
+++ b/pkgs/desktops/plasma-5.5/default.nix
@@ -26,8 +26,6 @@ let
         name = "${name}-${version}";
         inherit src;
 
-        setupHook = args.setupHook or ./setup-hook.sh;
-
         cmakeFlags =
           (args.cmakeFlags or [])
           ++ [ "-DBUILD_TESTING=OFF" ]
diff --git a/pkgs/desktops/plasma-5.5/setup-hook.sh b/pkgs/desktops/plasma-5.5/setup-hook.sh
deleted file mode 100644
index a8d9b7e0e36..00000000000
--- a/pkgs/desktops/plasma-5.5/setup-hook.sh
+++ /dev/null
@@ -1 +0,0 @@
-addToSearchPath XDG_DATA_DIRS @out@/share