diff --git a/roles/host_common.nix b/roles/host_common.nix
index d7e3bf1..b6d118c 100644
--- a/roles/host_common.nix
+++ b/roles/host_common.nix
@@ -59,6 +59,9 @@
       options = "--delete-older-than 90d";
     };
     autoOptimiseStore = true;
+    extraOptions = ''
+      show-trace = true   # Enable --show-trace by default for nix
+    '';
   };
 
   system.extraSystemBuilderCmds = ''