diff --git a/lib/subprocess.js b/lib/subprocess.js
index e0a41d5..f6053e7 100644
--- a/lib/subprocess.js
+++ b/lib/subprocess.js
@@ -156,8 +156,8 @@ Cu.import("resource://gre/modules/ctypes.jsm");
 
 const NS_LOCAL_FILE = "@mozilla.org/file/local;1";
 
-const Runtime = require("api-utils/runtime");
-const Environment = require("api-utils/environment").env;
+const Runtime = require("sdk/system/runtime");
+const Environment = require("sdk/system/environment").env;
 const DEFAULT_ENVIRONMENT = [];
 if (Runtime.OS == "Linux" && "DISPLAY" in Environment) {
   DEFAULT_ENVIRONMENT.push("DISPLAY=" + Environment.DISPLAY);