diff --git a/cli/ops/fs.rs b/cli/ops/fs.rs
index b7a8732d1d..61bc06d686 100644
--- a/cli/ops/fs.rs
+++ b/cli/ops/fs.rs
@@ -539,13 +539,13 @@ fn op_make_temp_dir(
 ) -> Result<JsonOp, ErrBox> {
   let args: MakeTempDirArgs = serde_json::from_value(args)?;
 
-  // FIXME
-  state.check_write(Path::new("make_temp"))?;
-
   let dir = args.dir.map(PathBuf::from);
   let prefix = args.prefix.map(String::from);
   let suffix = args.suffix.map(String::from);
 
+  state
+    .check_write(dir.clone().unwrap_or_else(std::env::temp_dir).as_path())?;
+
   let is_sync = args.promise_id.is_none();
   blocking_json(is_sync, move || {
     // TODO(piscisaureus): use byte vector for paths, not a string.