diff --git a/src/mach/pack/alpha/impl/tools_deps.clj b/src/mach/pack/alpha/impl/tools_deps.clj
index 98f472d..80f5a36 100644
--- a/src/mach/pack/alpha/impl/tools_deps.clj
+++ b/src/mach/pack/alpha/impl/tools_deps.clj
@@ -53,10 +53,16 @@
 
 (defn system-edn
   []
-  (-> "mach/pack/alpha/system_deps.edn"
-      io/resource
-      slurp
-      edn/read-string))
+  (let [defaults (-> "mach/pack/alpha/system_deps.edn"
+                     io/resource
+                     tools.deps.reader/slurp-deps)]
+    (if-let [clj-config (System/getenv "CLJ_CONFIG")]
+      (tools.deps.reader/merge-deps [defaults
+                                     (-> clj-config
+                                         (io/file "deps.edn")
+                                         tools.deps.reader/slurp-deps)])
+      defaults)))
+
 
 (comment
   (tools.deps/combine-aliases