# Pastebin 7bvn8PNf
$ vim Containerfile 
$ podman build --platform linux/amd64,linux/arm64 --manifest joetest:stable .
[linux/arm64] STEP 1/2: FROM registry.fedoraproject.org/fedora-toolbox:38
Trying to pull registry.fedoraproject.org/fedora-toolbox:38...
Getting image source signatures
Copying blob 8e4de1fdb89b done  
Copying blob d52e5cdb4fae done  
Copying config e2147d25a1 done  
Writing manifest to image destination
Storing signatures
[linux/arm64] STEP 2/2: RUN arch > /etc/arch
[linux/arm64] COMMIT
--> bed9876af6ff
[linux/amd64] STEP 1/2: FROM registry.fedoraproject.org/fedora-toolbox:38
bed9876af6ff5bb980a2ae8d82f58be593973adbf33cf1df1b9985e599625740
Trying to pull registry.fedoraproject.org/fedora-toolbox:38...
Getting image source signatures
Copying blob 69930001c1dc done  
Copying blob 48031c47e5fb done  
Copying config 997b52ccbf done  
Writing manifest to image destination
Storing signatures
[linux/amd64] STEP 2/2: RUN arch > /etc/arch
[linux/amd64] COMMIT
--> 91e2343c4f4d
91e2343c4f4ddddc916827e12a50bec51d9ae15e19d62aec7db3b6a7ae3f1804
$ podman manifest inspect joetest:stable
{
    "schemaVersion": 2,
    "mediaType": "application/vnd.docker.distribution.manifest.list.v2+json",
    "manifests": [
        {
            "mediaType": "application/vnd.oci.image.manifest.v1+json",
            "size": 757,
            "digest": "sha256:d5cc344d1f80002e6fb6bb042275909455177a86c4e8c21fbff7eee0560da897",
            "platform": {
                "architecture": "arm64",
                "os": "linux"
            }
        },
        {
            "mediaType": "application/vnd.oci.image.manifest.v1+json",
            "size": 757,
            "digest": "sha256:0b02e2da30b7ae9000d5158a3d23d5b54e5346e6c7e770955e22ba7c29fde4eb",
            "platform": {
                "architecture": "amd64",
                "os": "linux"
            }
        },
        {
            "mediaType": "application/vnd.oci.image.manifest.v1+json",
            "size": 921,
            "digest": "sha256:ff11d41723465c6a4322c7f4721a1173633a0ba288538674762cddb1df78ae3d",
            "platform": {
                "architecture": "arm64",
                "os": "linux"
            }
        },
        {
            "mediaType": "application/vnd.oci.image.manifest.v1+json",
            "size": 921,
            "digest": "sha256:2274867d81ba90692e62d2431633a35c16327e6d87cd79427dea5a08e7a29a2b",
            "platform": {
                "architecture": "amd64",
                "os": "linux"
            }
        }
    ]
}
$ podman run --rm --arch arm64 localhost/joetest:stable arch
WARNING: image platform (linux/amd64) does not match the expected platform (linux/arm64)
aarch64
$ podman run --rm --arch amd64 localhost/joetest:stable arch
x86_64