```ruby
require 'shellwords'
require 'posix/spawn'
require 'skeptick/error'

module Skeptick
  class Command
    module Executable
      def command
        Command.new(self)
      end

      def execute
        command.run
      end
      alias_method :build, :execute
      alias_method :run,   :execute
    end

    def initialize(command_obj)
      @command_obj = command_obj
    end

    def command
      @command_obj.to_s.shellsplit.shelljoin
    end
    alias_method :to_s, :command

    def run
      opts = {}
      opts[:chdir] = Skeptick.cd_path if Skeptick.cd_path

      if Skeptick.debug_mode?
        Skeptick.log("Skeptick Running: #{command}")
      end

      im_process = POSIX::Spawn::Child.new(command, opts)

      if !im_process.success?
        raise ImageMagickError,
          "ImageMagick error\nCommand: #{command}\nSTDERR:\n#{im_process.err}"
      end

      im_process.status
    end
  end
end
```

Call to_s on cd_dir path
user
```ruby
require 'shellwords'
require 'posix/spawn'
require 'skeptick/error'

module Skeptick
  class Command
    module Executable
      def command
        Command.new(self)
      end

      def execute
        command.run
      end
      alias_method :build, :execute
      alias_method :run,   :execute
    end

    def initialize(command_obj)
      @command_obj = command_obj
    end

    def command
      @command_obj.to_s.shellsplit.shelljoin
    end
    alias_method :to_s, :command

    def run
      opts = {}
      opts[:chdir] = Skeptick.cd_path.to_s if Skeptick.cd_path

      if Skeptick.debug_mode?
        Skeptick.log("Skeptick Command: #{command}")
      end

      im_process = POSIX::Spawn::Child.new(command, opts)

      if !im_process.success?
        raise ImageMagickError,
          "ImageMagick error\nCommand: #{command}\nSTDERR:\n#{im_process.err}"
      end

      im_process.status
    end
  end
end
```
assistant