diff --git a/SConstruct b/SConstruct
index 04a64d1a8..e65d5bf12 100644
--- a/SConstruct
+++ b/SConstruct
@@ -1362,7 +1362,7 @@ if env['python_package'] == 'minimal':
 
 SConscript('build/src/apps/SConscript')
 
-if env['OS'] != 'Windows':
+if env['CC'] != 'cl':
     VariantDir('build/platform', 'platform/posix', duplicate=0)
     SConscript('build/platform/SConscript')
 
diff --git a/platform/posix/SConscript b/platform/posix/SConscript
index 276e151bf..abcf1dae2 100644
--- a/platform/posix/SConscript
+++ b/platform/posix/SConscript
@@ -8,7 +8,7 @@ localenv = env.Clone()
 ### Generate customized scripts ###
 
 # 'setup_cantera'
-if localenv['layout'] != 'debian':
+if localenv['layout'] != 'debian' and env['OS'] != 'Windows':
     v = sys.version_info
 
     def copy_var(target, source, env):