diff --git a/tools/update-deps b/tools/update-deps
index 817e64e5..8f0f56cb 100755
--- a/tools/update-deps
+++ b/tools/update-deps
@@ -128,8 +128,8 @@ def updateV8():
 	elif sys.platform == 'darwin':
 		run(['make', '-j' + str(cores), 'native'], cwd=kV8Work)
 	elif sys.platform == 'win32':
-		run(['gn', 'gen', 'out/native', '--args="is_component_build=true"'])
-		run(['ninja', '-C', 'out/native'])
+		run(['gn', 'gen', 'out/native', '--args="is_component_build=true"'], cwd=kV8Work, env=win32Env)
+		run(['ninja', '-C', 'out/native'], cwd=kV8Work, env=win32Env)
 
 if __name__ == '__main__':
 	updateUv()