My Netlify builds were failing for the past few days and I couldn’t figure out why because everything looked right to me! It built locally too! This was the error:

11:16:48 PM: [imagetools] Could not load /opt/build/repo/src/content/blog/images/2025-snippets-from-the-new-york-walk-book/img-20251012220719179.png?enhanced (imported by src/content/blog/2025-snippets-from-the-new-york-walk-book.md): Input file is missing: /opt/build/repo/src/content/blog/images/2025-snippets-from-the-new-york-walk-book/img-20251012220719179.png

But that image is there, I swear it is! If it wasn’t there, why is my Mac just letting it work? I looked through my filesystem and saw that it was saved as IMG-..., not img-....

Apparently, the MacOS filesystem is case insensitive.. That would have been nice to know a week ago but ok.