diff --git a/script/cibuild b/script/cibuild
index 7fa14ba7..29cc3d2d 100755
--- a/script/cibuild
+++ b/script/cibuild
@@ -5,6 +5,8 @@ import platform
 import subprocess
 import sys
 
+from lib.util import get_vs_env
+
 
 SOURCE_ROOT = os.path.abspath(os.path.dirname(os.path.dirname(__file__)))
 # We're in JENKINS_ROOT/workspace/libchromiumcontent. Walk up to JENKINS_ROOT.
@@ -17,9 +19,6 @@ def main():
     return 'Error: Can\'t find {0}'.format(S3_CREDENTIALS_FILE)
   copy_to_environment(S3_CREDENTIALS_FILE)
 
-  print 'Python version:', platform.python_version()
-  print 'OS version:', os_version()
-
   if sys.platform in ['win32', 'cygwin']:
     return (run_ci(['-t', 'x64']) or
             run_ci(['-t', 'ia32']))
@@ -51,6 +50,15 @@ def os_version():
 
 
 def run_ci(args):
+  if sys.platform in ['win32', 'cygwin']:
+    target_arch = args[1]
+    # Set build env for VS.
+    if target_arch == 'x64':
+      vs_env = get_vs_env('14.0', 'x86_amd64')
+    elif target_arch == 'ia32':
+      vs_env = get_vs_env('14.0', 'amd64_x86')
+    os.environ.update(vs_env)
+
   return (run_script('bootstrap') or
           run_script('update', args) or
           run_script('build', args) or
diff --git a/script/update b/script/update
index bc97a879..3577b2ae 100755
--- a/script/update
+++ b/script/update
@@ -10,7 +10,6 @@ import tarfile
 import tempfile
 import urllib2
 
-from lib.util import get_vs_env
 from lib.config import get_output_dir
 
 
@@ -131,12 +130,6 @@ def gyp_env(target_arch, component, gyp_defines):
     env['GYP_MSVS_VERSION'] = '2015'
     # Use Windows 10 SDK.
     env['WINDOWSSDKDIR'] = 'C:\\Program Files (x86)\\Windows Kits\\10'
-    # Set build env for VS.
-    if target_arch == 'x64':
-      vs_env = get_vs_env('14.0', 'x86_amd64')
-    elif target_arch == 'ia32':
-      vs_env = get_vs_env('14.0', 'amd64_x86')
-    env.update(vs_env)
   elif sys.platform == 'linux2' and target_arch in ('arm', 'ia32'):
     # ARM build requires cross compilation.
     env['GYP_CROSSCOMPILE'] = '1'