diff --git a/tools/utils.toit b/tools/utils.toit
index 5c9e85e..e9c40b1 100644
--- a/tools/utils.toit
+++ b/tools/utils.toit
@@ -7,6 +7,7 @@ import host.file
 import host.os
 import host.pipe
 import writer
+import system show platform PLATFORM_WINDOWS
 
 with_tmp_directory [block]:
   tmpdir := directory.mkdtemp "/tmp/artemis-"