diff --git a/emsdk.py b/emsdk.py
index 5e38497..eb2686c 100644
--- a/emsdk.py
+++ b/emsdk.py
@@ -74,7 +74,7 @@
   MACOS = True
 
 LINUX = False
-if not MACOS and (platform.system() == 'Linux' or os.name == 'posix'):
+if not MACOS and (platform.system() == 'Linux'):
   LINUX = True
 
 UNIX = (MACOS or LINUX)