diff --git a/nix/modules/docker-prune.nix b/nix/modules/docker-prune.nix
index 7487f01..ba0abff 100644
--- a/nix/modules/docker-prune.nix
+++ b/nix/modules/docker-prune.nix
@@ -53,7 +53,7 @@ let
   };
 in
 {
-  systemd.services.docker-prune = {
+  systemd.services.ci-docker-prune = {
     description = "Surgical disk-pressure-gated Docker prune (dangling+old only; never --all/--volumes; never mid-run)";
     after = [ "docker.service" ];
     requires = [ "docker.service" ];
@@ -64,7 +64,7 @@ in
     };
   };
 
-  systemd.timers.docker-prune = {
+  systemd.timers.ci-docker-prune = {
     description = "Daily timer for the surgical Docker prune";
     wantedBy = [ "timers.target" ];
     timerConfig = {