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calibre downloads on macOS and Linux come from calibre's own server - #97

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fix/calibre-download-url
Oct 18, 2026
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KnifeLemon merged 1 commit into
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fix/calibre-download-url

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Installing calibre failed on Linux with 404 (Not Found) (seen in a log attached to #86). calibre's GitHub releases only keep files for the newest version, so the pinned 9.15.0 .txz/.dmg links died when 9.16.0 came out. download.calibre-ebook.com keeps every version, as the Windows .msi link already relies on.

  • Linux x64/arm64 and macOS URLs now point at https://download.calibre-ebook.com/9.15.0/….
  • Same files: the sizes match the pinned ones exactly, and the linux-arm64 SHA-256 was re-checked after downloading.
  • I checked every other pinned engine URL and they all answer 200.

engines.json is embedded, so macOS/Linux users need the next release (1.11.1) for this fix. Until then they can install calibre themselves and use "Use my copy…".

🤖 Generated with Claude Code

calibre's GitHub releases keep files only for the newest version: when 9.16.0
came out, the pinned 9.15.0 .txz and .dmg links there started returning 404,
so installing calibre failed on macOS and Linux. download.calibre-ebook.com
keeps every version; the files are the same (sizes and SHA-256 checked).

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
@KnifeLemon
KnifeLemon merged commit cf05708 into main Oct 18, 2026
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KnifeLemon deleted the fix/calibre-download-url branch October 19, 2026 12:55
@KnifeLemon KnifeLemon added the bug Something isn't working label Oct 20, 2026
@KnifeLemon KnifeLemon self-assigned this Oct 20, 2026
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