diff --git a/ui/build/sandbox_linux.go b/ui/build/sandbox_linux.go
index 98eb028..dab0e75 100644
--- a/ui/build/sandbox_linux.go
+++ b/ui/build/sandbox_linux.go
@@ -181,15 +181,15 @@
 		// For now, just map everything. Make most things readonly.
 		"-R", "/",
 
+		// Mount a writable tmp dir
+		"-B", "/tmp",
+
 		// Mount source are read-write
 		"-B", sandboxConfig.srcDir,
 
 		//Mount out dir as read-write
 		"-B", sandboxConfig.outDir,
 
-		// Mount a writable tmp dir
-		"-B", "/tmp",
-
 		// Disable newcgroup for now, since it may require newer kernels
 		// TODO: try out cgroups
 		"--disable_clone_newcgroup",