mimemagic 0.3.5 pin prevents
bundle install to work
$ bundle install Fetching gem metadata from https://rubygems.org/......... Resolving dependencies... Your bundle is locked to mimemagic (0.3.5) from rubygems repository https://rubygems.org/ or installed locally, but that version can no longer be found in that source. That means the author of mimemagic (0.3.5) has removed it. You'll need to update your bundle to a version other than mimemagic (0.3.5) that hasn't been removed in order to install.