What happens if I push all of nixpkgs
nixpkgs doc hooks desktop-file-utils.section.md
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desktop-file-utils {#desktop-file-utils} #

This setup hook removes the MIME cache (located at $out/share/applications/mimeinfo.cache) in the preFixupPhase.

This hook is necessary because mimeinfo.cache can be created when a package uses desktop-file-utils, resulting in collisions if multiple packages are installed that contain this file (as in #48295).