diff --git a/dev-tools/omdb/src/bin/omdb/nexus.rs b/dev-tools/omdb/src/bin/omdb/nexus.rs
index 29bed3e026..2e2010dc59 100644
--- a/dev-tools/omdb/src/bin/omdb/nexus.rs
+++ b/dev-tools/omdb/src/bin/omdb/nexus.rs
@@ -4500,13 +4500,18 @@ async fn cmd_nexus_support_bundles_download(
     let stream =
         support_bundle_download_ranges(client, args.id, start, total_length);
 
+    let mut open_opts = OpenOptions::new();
+    open_opts.create(true);
+
     let sink: Box<dyn std::io::Write> = match &args.output {
         Some(path) => Box::new(
-            OpenOptions::new()
-                .create(true)
-                .append(true)
-                .truncate(!args.resume)
-                .open(path)?,
+            if args.resume {
+                open_opts.append(true)
+            } else {
+                open_opts.write(true).truncate(true)
+            }
+            .open(path)
+            .with_context(|| format!("failed to create {path}"))?,
         ),
         None => Box::new(std::io::stdout()),
     };