diff --git a/poky/meta/classes/base.bbclass b/poky/meta/classes/base.bbclass
index cc81461..3515720 100644
--- a/poky/meta/classes/base.bbclass
+++ b/poky/meta/classes/base.bbclass
@@ -20,21 +20,14 @@
 def oe_import(d):
     import sys
 
-    bbpath = d.getVar("BBPATH").split(":")
-    sys.path[0:0] = [os.path.join(dir, "lib") for dir in bbpath]
-
-    def inject(name, value):
-        """Make a python object accessible from the metadata"""
-        if hasattr(bb.utils, "_context"):
-            bb.utils._context[name] = value
-        else:
-            __builtins__[name] = value
+    bbpath = [os.path.join(dir, "lib") for dir in d.getVar("BBPATH").split(":")]
+    sys.path[0:0] = [dir for dir in bbpath if dir not in sys.path]
 
     import oe.data
     for toimport in oe.data.typed_value("OE_IMPORTS", d):
         try:
-            imported = __import__(toimport)
-            inject(toimport.split(".", 1)[0], imported)
+            # Make a python object accessible from the metadata
+            bb.utils._context[toimport.split(".", 1)[0]] = __import__(toimport)
         except AttributeError as e:
             bb.error("Error importing OE modules: %s" % str(e))
     return ""