diff --git a/modules/system/nix/default.nix b/modules/system/nix/default.nix
index 0f2f8c3..04888ac 100644
--- a/modules/system/nix/default.nix
+++ b/modules/system/nix/default.nix
@@ -18,6 +18,9 @@ in
         extraOptions = ''
           experimental-features = nix-command flakes
         '';
+
+        # Keep my system responsive during builds
+        daemonNiceLevel = 19;
       };
     }