Bundle install fails with: Bundler could not find compatible versions for gem "railties":

bundler, ruby-on-rails, ruby-on-rails-4

Solution

Try removing `Gemfile.lock` and doing `bundle` again.

Try adding to Gemfile:

gem 'coffee-rails', git: 'git://github.com/rails/coffee-rails.git'

instead of:

gem 'coffe-rails'

Edit:

Ok, I have copied it locally and tried to resolve, my changes:

gem 'coffee-rails', git: 'git://github.com/rails/coffee-rails.git'
gem 'activeadmin',         github: 'gregbell/active_admin', branch: 'rails4'
gem 'rails', git: 'https://github.com/rails/rails.git', branch: '4-0-stable'
gem 'devise'
gem 'ransack'
gem 'sass-rails', git: 'https://github.com/rails/sass-rails.git'

and now it checks out, at least here.

Problem

I currently can't run `bundle install`. It always fails: ``` $ bundle install Fetching source index from https://rubygems.org/ Updating git://github.com/gregbell/active_admin.git fatal: Could not parse object 'a9949c1524205928b18597f840e83478ba97c2ef'. Git error: command `git reset --hard a9949c1524205928b18597f840e83478ba97c2ef` in directory /Users/noxoc/.rvm/gems/ruby-1.9.3-p385@tp-usevalue/bundler/gems/active_admin-a9949c152420 has failed. If this error persists you could try removing the cache directory '/Users/noxoc/.rvm/gems/ruby-1.9.3-p385@tp-usevalue/cache/bundler/git/active_admin-d67faab65e9b74efbc8efb4a777a851e9f78b2ca' ``` I already tried to remove the cache directory as advised. This is my Gemfile (sorted, comments stripped): ``` source 'https://rubygems.org' gem 'active_link_to' gem 'activeadmin' gem 'coffee-rails' gem 'compass-rails' gem 'debugger', group: [:development, :test] gem 'devise', github: 'plataformatec/devise' gem 'formtastic', github: 'justinfrench/formtastic' gem 'inherited_resources', github: 'josevalim/inherited_resources' gem 'jbuilder', '~> 1.2' gem 'jquery-rails' gem 'jquery-turbolinks' gem 'rails' gem 'rails-i18n', '~> 4.0.0.pre' # For 4.0.x gem 'ransack' gem 'responders', github: 'plataformatec/responders' gem 'sass-rails' gem 'simple_form' gem 'sqlite3' gem 'turbolinks' gem 'uglifier', '>= 1.3.0' group :doc do gem 'sdoc', require: false end group :development, :test do gem "rb-fsevent", "~> 0.9.1" gem "guard", "1.6.2" gem "guard-spork" gem "guard-rspec", "2.5.1" gem "rspec-rails", "2.13.1" gem "shoulda-matchers", "2.1.0" gem "capybara", "2.1.0" gem "launchy", "2.2.0" gem 'spork-rails', :github => 'sporkrb/spork-rails' gem "thin" end ``` What really confuses me, is that it worked just fine a couple of days ago. UPDATE: As zrl3dx suggested, I removed the `Gemfile.lock` and ran `bundle` again - which results in this error: ``` $ bundle Updating git://github.com/gregbell/active_admin.git Updating git://github.com/milgner/compass-rails.git Updating git://github.com/plataformatec/devise.git Updating git://github.com/justinfrench/formtastic.git Updating git://github.com/josevalim/inherited_resources.git Updating git://github.com/ernie/ransack.git Updating git://github.com/plataformatec/responders.git Updating git://github.com/sporkrb/spork-rails.git Fetching gem metadata from https://rubygems.org/......... Fetching gem metadata from https://rubygems.org/.. Resolving dependencies... Bundler could not find compatible versions for gem "ransack": In Gemfile: activeadmin (>= 0) ruby depends on ransack (>= 1.0.0) ruby ransack (0.7.3) Bundler could not find compatible versions for gem "railties": In Gemfile: rails (= 4.0.0) ruby depends on railties (= 4.0.0) ruby coffee-rails (~> 4.0.0) ruby depends on railties (4.0.0.rc2) ```

Original source