lix: link debuginfo into the closure

This is to ease debugging of lix-project/lix#549

hosts/epyc.nix

@@ -16,6 +16,15 @@ in
     ../modules/lix-bug-details-pls
   ];
 
+  # Include debuginfo for Lix
+  environment.systemPackages = [
+    pkgs.lix.debug
+    pkgs.lix.passthru.capnproto-lix.debug
+  ];
+  environment.pathsToLink = [
+    "/lib/debug"
+  ];
+
   networking.hostName = "epyc";
 
   security.acme.acceptTerms = true;