A few months back I bought a new Synology NAS and decided to, on a whim, build an app for it from scratch. Partly to see how well Claude Code could handle it, mostly to see whether the option was open to me.
Starting off with the most basic app, the Python backend worked, the tests passed, the SPK archive assembled cleanly, but then Synology’s Package Center rejected it with the error "Invalid file format. Please contact the package developer.". That’s it. No logs, no debug information. Good luck.
omervk.com · Apr 5, 2026
Tackling Synology's Opaque "Invalid File Format" Error
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A few months back I bought a new Synology NAS and decided to, on a whim, build an app for it from scratch. Partly to see how well Claude Code could handle it, mostly to see whether the option was open to me.
Starting off with the most basic app, the Python backend worked, the tests passed, the SPK archive assembled cleanly, but then Synology’s Package Center rejected it with the error…
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