diff --git a/emsdk b/emsdk
index e32b2bf..aa1c8fb 100755
--- a/emsdk
+++ b/emsdk
@@ -36,7 +36,7 @@ if os.name == 'nt':
   ENVPATH_SEPARATOR = ';'
 
 LINUX = False
-if platform.system() == 'Linux':
+if platform.system() == 'Linux' or os.name == 'posix':
   LINUX = True
   ENVPATH_SEPARATOR = ':'