Renamed to aDifferentJT/elm-bootstrap. That is where the repository lives now. It has not been published as a package under the new name.
Versions published as nixCodeX/elm-bootstrap still install under that name. 13 versions of 13 come from the new location (see their notes).
Rerouted (renamed, verified). The GitHub user or repository was renamed. The tag is still there, at the new name. The Lamdera package server serves a copy recovered from https://github.com/aDifferentJT/elm-bootstrap.
What we checked: The repo moved to github.com/aDifferentJT/elm-bootstrap. Rebuilt with git archive from commit dd82b25f7452 of https://github.com/aDifferentJT/elm-bootstrap (zip prefix nixCodeX-elm-bootstrap-dd82b25/, America/Los_Angeles times): the zip is byte-identical to the one package.elm-lang.org recorded, SHA-1 69243a1ee99ee0a01442c418a60f2f997e42c876.
The Lamdera compiler uses this copy and prints a one-line notice saying so. elm itself fails to download this version.
Details · package.elm-lang.org's zip: https://github.com/nixCodeX/elm-bootstrap/zipball/3.1.0/
This is a fork of rundis/elm-bootstrap that adds the ability to nest accordions.
Unless you specifically need that feature use the original.
If you do need that feature, this packages is used in the same way as the original so consult the documentation for that package.
The BSD 3 Clause License