diff --git a/pkgs/misc/drivers/hplip/default.nix b/pkgs/misc/drivers/hplip/default.nix
index e1978073698b..9d6bd2dcfb97 100644
--- a/pkgs/misc/drivers/hplip/default.nix
+++ b/pkgs/misc/drivers/hplip/default.nix
@@ -53,7 +53,10 @@ stdenv.mkDerivation {
     saneBackends
     dbus
     net_snmp
-  ] ++ stdenv.lib.optional qtSupport qt4;
+  ] ++ stdenv.lib.optionals qtSupport [
+    qt4
+  ];
+
   nativeBuildInputs = [
     pkgconfig
   ];
@@ -65,7 +68,9 @@ stdenv.mkDerivation {
     recursivePthLoader
     reportlab
     usbutils
-  ] ++ stdenv.lib.optional qtSupport pyqt4;
+  ] ++ stdenv.lib.optionals qtSupport [
+    pyqt4
+  ];
 
   prePatch = ''
     # HPLIP hardcodes absolute paths everywhere. Nuke from orbit.