- `output_directory` (string) - This setting specifies the directory that artifacts from the build, such as the virtual machine files and disks, will be output to. The path to the directory may be relative or absolute. If relative, the path is relative to the working directory packer is executed from. This directory must not exist or, if created, must be empty prior to running the builder. By default this is "output-BUILDNAME" where "BUILDNAME" is the name of the build.