Railties - Related Error on Sync

[stationkeeping]

Syncing or building Throws the following:

/Users/username/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/asset_sync-0.5.4/lib/asset_sync/railtie.rb:1:in<top (required)>': uninitialized constant Rails::Railtie (NameError)`

asset_sync (0.5.4) 
middleman-sync (3.0.9)

Tried including Railties explicitly in the Gemfile, but this leads to a tangle of gem dependency errors.

activate :sync do |sync|
  sync.fog_provider = 'AWS' # Your storage provider
  sync.fog_directory = ENV['AWS_BUCKET'] # Your bucket name
  sync.fog_region = ENV['AWS_REGION'] # The region your storage bucket is in (eg us-east-1, us-west-1, eu-west-1, ap-southeast-1 )
  sync.aws_access_key_id = ENV['AWS_ACCESS_KEY_ID'] # Your Amazon S3 access key
  sync.aws_secret_access_key = ENV['AWS_SECRET_ACCESS_KEY'] # Your Amazon S3 access secret
  sync.existing_remote_files = 'keep' # What to do with your existing remote files? ( keep or delete )
  sync.after_build = true # Disable sync to run after Middleman build ( defaults to true )
end

[isaksky]

+1.

[mparramont]

+1 here

[Undistraction]

+1

[karlfreeman]

I think this might be the suspect problem. Try upgrading to middleman-sprockets 3.0.10

[mparramont]

Yup, adding the following to my Gemfile:

gem 'middleman-sprockets', '-> 3.0.10'

fixed the problem. Thanks!

[stationkeeping]

This looks good.