如何在没有版本号的情况下解决Bundler依赖关系

Question

bundle install

显示此错误：

Bundler could not find compatible versions for gem "fog-core":
  In Gemfile:
    fog was resolved to 1.41.0, which depends on
      fog-core (~> 1.45)

    dragonfly-s3_data_store was resolved to 1.3.0, which depends on
      fog-aws (>= 0.6.0) was resolved to 2.0.1, which depends on
        fog-core (~> 1.38)

    fog was resolved to 1.41.0, which depends on
      fog-cloudatcost (~> 0.1.0) was resolved to 0.1.2, which depends on
        fog-core (~> 1.36)

    fog-google (= 0.1.0) was resolved to 0.1.0, which depends on
      fog-core

    fog was resolved to 1.41.0, which depends on
      fog-internet-archive was resolved to 0.0.1, which depends on
        fog-core (>= 1.21.0)

    fog was resolved to 1.41.0, which depends on
      fog-joyent was resolved to 0.0.1, which depends on
        fog-core (~> 1.42)

如果我派上fog-google并将.gemspec修改为具有版本号，则Bundler将继续。

如何在不派生fog-google的情况下做到这一点？