fix node version check.

1 files changed, 1 insertions, 1 deletions

diff --git a/configure.py b/configure.py
index 8fc6e04..a7a2be9 100644
--- a/configure.py
+++ b/configure.py
@@ -47,7 +47,7 @@ def _tool_node():
     if _existence('node') is None:
         sys.exit('Error: node executable not found.\nIf you are using Linux, Ubuntu or Debian, try installing the\nnode-legacy package or symlink node to nodejs.')
     else:
-        if subprocess.getstatusoutput("node -p 'process.exit(!(/v([0-9]+)/.exec(process.version)[1] >= 4))'")[1] is '':
+        if subprocess.getstatusoutput("node -p 'process.exit(!(/v([0-9]+)/.exec(process.version)[1] >= 4))'")[1] is not '':
             # and exit(1) here?
             sys.exit('Your node version is too old, use Node 4.x or newer')
         else: