diskimage-builder/diskimage_builder/elements/dracut-ramdisk/pkg-map

{
  "family":{
    "debian":{
      "ncat":"netcat-traditional",
      "tftp":"tftp-hpa"
    },
    "redhat":{
      "ncat":"nmap-ncat"
    },
    "suse":{
      "arping": "iputils"
    }
  },
  "default":{
    "ncat":"ncat",
    "tftp":"tftp"
  }
}