github.com/containers/podman/v5@v5.1.0-rc1/docs/source/markdown/options/format.md (about)

     1  ####> This option file is used in:
     2  ####>   podman build, farm build
     3  ####> If file is edited, make sure the changes
     4  ####> are applicable to all of those.
     5  #### **--format**
     6  
     7  Control the format for the built image's manifest and configuration data.
     8  Recognized formats include *oci* (OCI image-spec v1.0, the default) and
     9  *docker* (version 2, using schema format 2 for the manifest).
    10  
    11  Note: You can also override the default format by setting the BUILDAH\_FORMAT
    12  environment variable.  `export BUILDAH_FORMAT=docker`