namespace :deploy do
  desc 'Install everything onto the server'
  task :install do
    on roles(:all) do |host|
      execute :sudo, 'apt-get -y update'
      execute :sudo, 'apt-get -y install python-software-properties git nodejs libcurl4-openssl-dev autoconf bison build-essential libssl-dev libyaml-dev libreadline6-dev zlib1g-dev libncurses5-dev libpq-dev'
    end
  end
end

namespace :deploy do
  desc 'Install everything onto the server'
  task :install do
    on roles(:all) do |host|
      execute :sudo, 'apt-get -y update'
      execute :sudo, 'apt-get -y install python-software-properties git nodejs libcurl4-openssl-dev autoconf bison build-essential libssl-dev libyaml-dev libreadline6-dev zlib1g-dev libncurses5-dev'
    end
  end
end

--- 
+++ 
@@ -3,7 +3,7 @@
   task :install do
     on roles(:all) do |host|
       execute :sudo, 'apt-get -y update'
-      execute :sudo, 'apt-get -y install python-software-properties git nodejs libcurl4-openssl-dev autoconf bison build-essential libssl-dev libyaml-dev libreadline6-dev zlib1g-dev libncurses5-dev'
+      execute :sudo, 'apt-get -y install python-software-properties git nodejs libcurl4-openssl-dev autoconf bison build-essential libssl-dev libyaml-dev libreadline6-dev zlib1g-dev libncurses5-dev libpq-dev'
     end
   end
 end
Install libpq-dev for pg gem
