Running rails g devise:views -e haml produces the following errors:

Required dependency hpricot not found!
Run "gem install hpricot" to get it.
Use --trace for backtrace.
Required dependency hpricot not found!
Run "gem install hpricot" to get it.
Use --trace for backtrace.
Required dependency hpricot not found!
Run "gem install hpricot" to get it.
Use --trace for backtrace.
Required dependency hpricot not found!
Run "gem install hpricot" to get it.
Use --trace for backtrace.
Required dependency hpricot not found!
Run "gem install hpricot" to get it.
Use --trace for backtrace.
Required dependency hpricot not found!
Run "gem install hpricot" to get it.
Use --trace for backtrace.
Required dependency hpricot not found!
Run "gem install hpricot" to get it.
Use --trace for backtrace.
Required dependency hpricot not found!
Run "gem install hpricot" to get it.
Use --trace for backtrace.
Required dependency hpricot not found!
Run "gem install hpricot" to get it.
Use --trace for backtrace.
Required dependency hpricot not found!
Run "gem install hpricot" to get it.
Use --trace for backtrace.
Required dependency hpricot not found!
Run "gem install hpricot" to get it.
Use --trace for backtrace.
exist app/views/devise
create app/views/devise/confirmations/new.html.haml
create app/views/devise/mailer/confirmation_instructions.html.haml
create app/views/devise/mailer/reset_password_instructions.html.haml
create app/views/devise/mailer/unlock_instructions.html.haml
create app/views/devise/passwords/edit.html.haml
create app/views/devise/passwords/new.html.haml
create app/views/devise/registrations/edit.html.haml
create app/views/devise/registrations/new.html.haml
create app/views/devise/sessions/new.html.haml
create app/views/devise/shared/_links.haml
create app/views/devise/unlocks/new.html.haml

The created haml templates are empty files.

Current workaround is to add hpricot and ruby_parser to the gemfile.