lirc: Set a writable lockdir

nixos/modules/services/hardware/lirc.nix

@@ -65,7 +65,7 @@ in {
       unitConfig.Documentation = [ "man:lircd(8)" ];
 
       serviceConfig = {
-        RuntimeDirectory = "lirc";
+        RuntimeDirectory = ["lirc" "lirc/lock"];
 
         # Service runtime directory and socket share same folder.
         # Following hacks are necessary to get everything right:

pkgs/development/libraries/lirc/default.nix

@@ -42,6 +42,7 @@ stdenv.mkDerivation rec {
     "--with-systemdsystemunitdir=$(out)/lib/systemd/system"
     "--enable-uinput" # explicit activation because build env has no uinput
     "--enable-devinput" # explicit activation because build env has no /dev/input
+    "--with-lockdir=/run/lirc/lock" # /run/lock is not writable for 'lirc' user
   ];
 
   installFlags = [