Mina 1.0.6, on windows, fork() function is unimplemented on this machine

[insub]

On my windows, setup mina version = 1.0.6
when i run "mina deploy", still have error:
fork() function is unimplemented on this machine

ruby 2.3
rails 5.0.0.1

More info:
mina deploy -t :
** Invoke deploy (first_time)
** Execute deploy
** Invoke environment (first_time)
** Execute environment
** Invoke git:clone (first_time)
** Execute git:clone
** Invoke deploy:link_shared_paths (first_time)
** Execute deploy:link_shared_paths
** Invoke bundle:install (first_time)
** Execute bundle:install
** Invoke rails:db_migrate (first_time)
** Execute rails:db_migrate
** Invoke rails:assets_precompile (first_time)
** Execute rails:assets_precompile
** Invoke deploy:cleanup (first_time)
** Execute deploy:cleanup
mina aborted!
NotImplementedError: fork() function is unimplemented on this machine
D:/RailsInstaller/Ruby2.3.0/lib/ruby/gems/2.3.0/gems/open4-1.3.4/lib/open4.rb:62:in fork' D:/RailsInstaller/Ruby2.3.0/lib/ruby/gems/2.3.0/gems/open4-1.3.4/lib/open4.rb:62:in do_popen'
D:/RailsInstaller/Ruby2.3.0/lib/ruby/gems/2.3.0/gems/open4-1.3.4/lib/open4.rb:34:in popen4' D:/RailsInstaller/Ruby2.3.0/lib/ruby/gems/2.3.0/gems/mina-1.0.6/lib/mina/runner/pretty.rb:15:in run'
D:/RailsInstaller/Ruby2.3.0/lib/ruby/gems/2.3.0/gems/mina-1.0.6/lib/mina/runner.rb:14:in run' D:/RailsInstaller/Ruby2.3.0/lib/ruby/gems/2.3.0/gems/mina-1.0.6/lib/mina/commands.rb:49:in block in run'
D:/RailsInstaller/Ruby2.3.0/lib/ruby/gems/2.3.0/gems/mina-1.0.6/lib/mina/helpers/internal.rb:39:in report_time' D:/RailsInstaller/Ruby2.3.0/lib/ruby/gems/2.3.0/gems/mina-1.0.6/lib/mina/commands.rb:48:in run'
D:/RailsInstaller/Ruby2.3.0/lib/ruby/gems/2.3.0/gems/mina-1.0.6/lib/mina/dsl.rb:30:in run' D:/RailsInstaller/Ruby2.3.0/lib/ruby/gems/2.3.0/gems/mina-1.0.6/lib/mina/dsl.rb:49:in deploy'
D:/Sites/rongzhi/config/deploy.rb:48:in block in <top (required)>' D:/RailsInstaller/Ruby2.3.0/lib/ruby/gems/2.3.0/gems/rake-11.3.0/lib/rake/task.rb:248:in block in execute'
D:/RailsInstaller/Ruby2.3.0/lib/ruby/gems/2.3.0/gems/rake-11.3.0/lib/rake/task.rb:243:in each' D:/RailsInstaller/Ruby2.3.0/lib/ruby/gems/2.3.0/gems/rake-11.3.0/lib/rake/task.rb:243:in execute'
D:/RailsInstaller/Ruby2.3.0/lib/ruby/gems/2.3.0/gems/rake-11.3.0/lib/rake/task.rb:187:in block in invoke_with_call_ch n' D:/RailsInstaller/Ruby2.3.0/lib/ruby/2.3.0/monitor.rb:214:in mon_synchronize'
D:/RailsInstaller/Ruby2.3.0/lib/ruby/gems/2.3.0/gems/rake-11.3.0/lib/rake/task.rb:180:in invoke_with_call_chain' D:/RailsInstaller/Ruby2.3.0/lib/ruby/gems/2.3.0/gems/rake-11.3.0/lib/rake/task.rb:173:in invoke'
D:/RailsInstaller/Ruby2.3.0/lib/ruby/gems/2.3.0/gems/rake-11.3.0/lib/rake/application.rb:152:in invoke_task' D:/RailsInstaller/Ruby2.3.0/lib/ruby/gems/2.3.0/gems/rake-11.3.0/lib/rake/application.rb:108:in block (2 levels) in t
_level'

[RedNoo]

do you have any solution for this problem?

[skyway777]

You can try to set in config/deploy.rb
set :execution_mode, :exec if RbConfig::CONFIG['host_os'] =~ /mswin|mingw/

[lovro-bikic]

This should be fixed with #686, which will be released in 1.3.0. We used to use the open4 gem which calls fork, but it has since been replaced with the Windows-compatible open3.