put systemd unit dirs on the right place

Also see #1936.

pkgs/tools/misc/colord/default.nix

@@ -12,7 +12,11 @@ stdenv.mkDerivation rec {
 
   enableParallelBuilding = true;
 
-  configureFlags = "--with-udevrulesdir=$out/lib/udev/rules.d --with-systemdsystemunitdir=$out/lib/udev/rules.d --disable-bash-completion";
+  configureFlags = [
+    "--with-udevrulesdir=$out/lib/udev/rules.d"
+    "--with-systemdsystemunitdir=$(out)/etc/systemd/system"
+    "--disable-bash-completion"
+  ];
 
   buildInputs = [ glib polkit pkgconfig intltool gusb libusb1 lcms2 sqlite systemd dbus gobjectIntrospection
                   bashCompletion ];

pkgs/tools/misc/system-config-printer/default.nix

@@ -27,7 +27,7 @@ stdenv.mkDerivation rec {
 
   configureFlags =
     [ "--with-udev-rules"
-      "--with-systemdsystemunitdir=$(out)/etc/systemd/systemd"
+      "--with-systemdsystemunitdir=$(out)/etc/systemd/system"
     ];
 
   postInstall =

pkgs/tools/security/pcsclite/default.nix

@@ -12,13 +12,10 @@ stdenv.mkDerivation rec {
   # The OS should care on preparing the drivers into this location
   configureFlags = [
     "--enable-usbdropdir=/var/lib/pcsc/drivers"
-    "--with-systemdsystemunitdir=$out/lib/systemd/system" # probably
+    "--with-systemdsystemunitdir=$(out)/etc/systemd/system"
+    "--enable-confdir=$(out)/etc"
   ];
 
-  preConfigure = ''
-    configureFlags="$configureFlags --enable-confdir=$out/etc"
-  '';
-
   buildInputs = [ udev dbus_libs perl ];
 
   nativeBuildInputs = [ pkgconfig ];