diff --git a/src/leiningen/classpath.clj b/src/leiningen/classpath.clj
index b416312a..6942b4eb 100644
--- a/src/leiningen/classpath.clj
+++ b/src/leiningen/classpath.clj
@@ -1,6 +1,6 @@
 (ns leiningen.classpath
   "Print the classpath of the current project."
-  (:use [leiningen.core :only [read-project]]
+  (:use [leiningen.core :only [read-project no-dev?]]
         [leiningen.deps :only [find-jars]]
         [leiningen.util.paths :only [leiningen-home]]
         [clojure.java.io :only [file]]
@@ -45,15 +45,17 @@
 (defn get-classpath
   "Answer a list of classpath entries for PROJECT."
   [project]
-  (concat [(:source-path project)
-           (:test-path project)
+  (concat (if-not (no-dev?)
+            [(:test-path project)
+             (:dev-resources-path project)])
+          [(:source-path project)
            (:compile-path project)
-           (:dev-resources-path project)
            (:resources-path project)]
           (:extra-classpath-dirs project)
           (checkout-deps-paths project)
           (find-jars project)
-          (user-plugins)))
+          (if-not (no-dev?)
+            (user-plugins))))
 
 (defn get-classpath-string [project]
   (join java.io.File/pathSeparatorChar (get-classpath project)))
diff --git a/src/leiningen/core.clj b/src/leiningen/core.clj
index b2395df3..bef8d002 100644
--- a/src/leiningen/core.clj
+++ b/src/leiningen/core.clj
@@ -25,6 +25,13 @@
 
 (defdeprecated normalize-path paths/normalize-path)
 
+(defn no-dev?
+  "Should the dev dependencies and directories be ignored?
+
+Warning: alpha; subject to change."
+  []
+  (System/getenv "LEIN_NO_DEV"))
+
 (defn user-init
   "Load the user's ~/.lein/init.clj file, if present."
   []
diff --git a/src/leiningen/deps.clj b/src/leiningen/deps.clj
index 125206ea..5b912495 100644
--- a/src/leiningen/deps.clj
+++ b/src/leiningen/deps.clj
@@ -1,7 +1,7 @@
 (ns leiningen.deps
   "Download all dependencies and put them in :library-path."
   (:require [lancet.core :as lancet])
-  (:use [leiningen.core :only [repositories-for user-settings]]
+  (:use [leiningen.core :only [repositories-for user-settings no-dev?]]
         [leiningen.util.maven :only [make-dependency]]
         [leiningen.util.file :only [delete-file-recursively]]
         [leiningen.util.paths :only [get-os get-arch]]
@@ -190,7 +190,8 @@
       (delete-file-recursively (:library-path project) :silently)
       (delete-file-recursively (File. (:root project) "native") :silently))
     (let [fileset (do-deps project :dependencies)]
-      (do-deps project :dev-dependencies)
+      (when-not (no-dev?)
+        (do-deps project :dev-dependencies))
       (extract-native-deps project)
       (when (:checksum-deps project)
         (spit (new-deps-checksum-file project) (deps-checksum project)))