diff --git a/circle.yml b/circle.yml
index e3cccfc..e8bbe1d 100644
--- a/circle.yml
+++ b/circle.yml
@@ -4,7 +4,7 @@ machine:
 
 dependencies:
   pre:
-    - wget https://github.com/boot-clj/boot-bin/releases/download/2.4.2/boot.sh
+    - wget https://github.com/boot-clj/boot-bin/releases/download/2.5.2/boot.sh
     - mv boot.sh boot && chmod a+x boot && sudo mv boot /usr/local/bin
 
 test:
diff --git a/src/mount/core.cljc b/src/mount/core.cljc
index e8e70d4..41e0152 100644
--- a/src/mount/core.cljc
+++ b/src/mount/core.cljc
@@ -302,11 +302,3 @@
 (defn resume [& states]
   (let [states (or (seq states) (all-without-subs))]
     {:resumed (bring states sigcont <)}))
-
-(defn system []           ;; if/when lift vars, will be in a "system-mode" later
-  (let [sys @meta-state]
-    (into {}
-          (for [[k {:keys [inst var]}] sys]
-            [(unvar-state k) (if (= :cljc @mode)
-                               @inst
-                               @var)]))))
diff --git a/src/mount/system.clj b/src/mount/system.clj
deleted file mode 100644
index 808093b..0000000
--- a/src/mount/system.clj
+++ /dev/null
@@ -1,75 +0,0 @@
-(ns mount.system
-  (:require [mount.core :as mount]))
-
-(defprotocol Lifecycle
-  (start [this] "starts a system")
-  (stop [this] "stops a system")
-  ;; (start-with [this states])
-  ;; (start-without [this states])
-  ;; (stop-except [this states])
-  )
-
-(defrecord MountSystem [components])
-
-(defn- select-fun [states f]
-  (into []
-    (for [[name state] states]
-      (when-let [fun (f state)]
-        [name fun]))))
-
-(defn- bring-system [funs]
-  (into {}
-    (for [[name fun] funs]
-      [name (fun)])))
-
-(defn- unvar-state [s]
-  (->> s (drop 2) (apply str)))  ;; magic 2 is removing "#'" in state name
-
-(defn unvar-names [states]
-  (into {} (for [[k v] states]
-             [(unvar-state k) v])))
-
-(defn- not-started [states]
-  (into {}
-    (for [state (keys states)]
-      [state :not-started])))
-
-(defn- detach [sys]
-  (doseq [[state {:keys [var status] :as v}] sys]
-    (alter-var-root var (constantly :not-started))
-    (#'mount.core/update-meta! [state :status] #{:stopped})
-    (#'mount.core/update-meta! [state :var] :not-started)))
-
-(defn- attach [sys]
-  (into {}
-        (for [[k {:keys [var]}] sys]
-          [(unvar-state k) @var])))
-
-(defn- spawn [sys]
-  (mount/start)
-  (let [spawned (attach sys)]
-    (detach sys)
-    spawned))
-
-(defn new-system [meta-state]
-  (let [states (-> (sort-by (comp :order val) < 
-                            meta-state)
-                    unvar-names)
-        down (reverse (select-fun states :stop))]
-    (extend-type MountSystem
-      Lifecycle
-      (start [states] (->MountSystem (spawn meta-state)))
-      (stop [_] (bring-system down)))
-    (->MountSystem (not-started states))))
-
-(comment
-
-(require :reload '[mount.system :as m])
-(def ms @@#'mount.core/meta-state)
-(def sys (new-system ms))
-(def sys (m/start sys))
-
-;; at this point the system is up and detached: i.e. "global" vars and mount do not see it
-;; TODO: figure out stopping it.. i.e. need to convert stops to work with @deps
-;;       ... quite possible in "cljc" :)
-)