diff --git a/src/node/binding.gyp b/src/node/binding.gyp
index 6f7620d990fcab9a62f10538d6500bfa3e0ce145..7ef3bdf4bdedaf150aaa75d8ef0b4f290d3d877d 100644
--- a/src/node/binding.gyp
+++ b/src/node/binding.gyp
@@ -1,9 +1,4 @@
 {
-  "variables" : {
-    'no_install': "<!(echo $GRPC_NO_INSTALL)",
-    'grpc_root': "<!(echo $GRPC_ROOT)",
-    'grpc_lib_subdir': "<!(echo $GRPC_LIB_SUBDIR)"
-    },
   "targets" : [
     {
       'include_dirs': [