feat(seedrng): use it

modules/s6/default.nix

@@ -1,4 +1,4 @@
-{ config, pkgs, ... }:
+{ config, pkgs, lib, ... }:
 let
   inherit (pkgs)
     execline
@@ -31,6 +31,8 @@ let
       mkdir $out
       cp -r $src $out/scripts
       chmod -R +w $out
+      substituteInPlace $out/scripts/{rc.init,rc.shutdown} \
+        --replace-warn 'pkgs.seedrng' "${lib.getExe' pkgs.seedrng "seedrng"}"
     '';
   };
   service = dir  {

modules/s6/scripts/rc.init

@@ -32,6 +32,8 @@ else
     mkdir -m 0751 -p /run/services/state
 fi
 
+pkgs.seedrng
+
 ### If your services are managed by s6-rc:
 ### (replace /run/service with your scandir)
 s6-rc-init -d -c /etc/s6-rc/compiled /run/service

modules/s6/scripts/rc.shutdown

@@ -4,6 +4,7 @@
 ### Things to do before hardware halt/reboot/poweroff.
 ### Ideally, it should be a single call to the service manager,
 ### telling it to bring all the services down.
+pkgs.seedrng
 
 ### If your s6-linux-init-maker invocation was made with the -1
 ### option, messages from rc.shutdown will appear on /dev/console