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diff --git a/data/build-flavors/README.md b/data/build-flavors/README.md
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+# VyOS build flavors
+
+VyOS supports multiple different hardware and virtual platforms.
+Those platforms often need custom packages and may require custom
+configs. To make maintenance of existing flavors simpler
+and to allow everyone to make and maintain their own flavors,
+the build scripts support storing flavor configuration in [TOML](https://toml.io) files.
+
+Flavor files must be in `data/build-flavors`. Here's an example:
+
+```toml
+# Generic (aka "universal") ISO image
+
+image_format = "iso"
+
+# Include these packages in the image regardless of the architecture
+packages = [
+  # QEMU and Xen guest tools exist for multiple architectures
+  "qemu-guest-agent",
+  "vyos-xe-guest-utilities",
+]
+
+[architectures.amd64]
+  # Hyper-V and VMware guest tools are x86-only
+  packages = ["hyperv-daemons", "vyos-1x-vmware"]
+```
+
+## Image format
+
+The `image_format` option specifies the default format to build.
+
+```toml
+image_format = "iso"
+```
+
+**Note:** currently, ISO is the only supported format,
+support for different flavors is in progress.
+
+## Including custom packages
+
+If you want the build scripts to include custom packages from repositories
+in the image, you can list them in the `packages` field.
+
+For example, this is how to include the GNU Hello package:
+
+```toml
+packages = ['hello']
+```
+
+It's possible to include packages only in images with certain build architectures
+by placing them in a subtable.
+
+If you want to include GNU Hello only in AMD64 images, do this:
+
+```toml
+[architectures.amd64]
+  packages = ['hello']
+```
+
+## Including custom files
+
+You can include files inside the SquashFS filesystem by adding entries
+to the `includes_chroot` array. 
+
+```toml
+[[includes_chroot]]
+  path = "etc/question.txt"
+  data = '''
+Can you guess how this file ended up in the image?
+  '''
+
+  path = "etc/answer.txt"
+  data = '''
+It was in the flavor file!
+  '''
+```
diff --git a/data/build-flavors/azure-iso.toml b/data/build-flavors/azure-iso.toml
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+++ b/data/build-flavors/azure-iso.toml
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+image_format = "iso"
+
+packages = ["waagent"]
+
+
diff --git a/data/build-flavors/edgecore.toml b/data/build-flavors/edgecore.toml
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+# ISO image for EdgeCore routers
+
+image_format = "iso"
+
+# udev rules for correct ordering of onboard NICs
+[[includes_chroot]]
+  path = "lib/udev/rules.d/64-vyos-SAF51015I-net.rules"
+  data = '''
+ATTR{[dmi/id]board_name}!="SAF51015I-0318-EC", GOTO="end_ec_nic"
+
+ACTION=="add", SUBSYSTEM=="net", KERNELS=="0000:02:00.0", ENV{VYOS_IFNAME}="eth1"
+ACTION=="add", SUBSYSTEM=="net", KERNELS=="0000:03:00.0", ENV{VYOS_IFNAME}="eth2"
+ACTION=="add", SUBSYSTEM=="net", KERNELS=="0000:04:00.0", ENV{VYOS_IFNAME}="eth3"
+ACTION=="add", SUBSYSTEM=="net", KERNELS=="0000:05:00.0", ENV{VYOS_IFNAME}="eth4"
+ACTION=="add", SUBSYSTEM=="net", KERNELS=="0000:06:00.0", ENV{VYOS_IFNAME}="eth5"
+ACTION=="add", SUBSYSTEM=="net", KERNELS=="0000:06:00.1", ENV{VYOS_IFNAME}="eth6"
+ACTION=="add", SUBSYSTEM=="net", KERNELS=="0000:06:00.2", ENV{VYOS_IFNAME}="eth7"
+ACTION=="add", SUBSYSTEM=="net", KERNELS=="0000:06:00.3", ENV{VYOS_IFNAME}="eth8"
+ACTION=="add", SUBSYSTEM=="net", KERNELS=="0000:0a:00.0", ENV{VYOS_IFNAME}="eth9"
+ACTION=="add", SUBSYSTEM=="net", KERNELS=="0000:0a:00.1", ENV{VYOS_IFNAME}="eth10"
+ACTION=="add", SUBSYSTEM=="net", KERNELS=="0000:0b:00.0", ENV{VYOS_IFNAME}="eth11"
+ACTION=="add", SUBSYSTEM=="net", KERNELS=="0000:0b:00.1", ENV{VYOS_IFNAME}="eth12"
+
+LABEL="end_ec_nic"
+
+'''
+
+[[includes_chroot]]
+  path = "lib/udev/rules.d/64-vyos-SAF51003I-net.rules"
+  data = '''
+ATTR{[dmi/id]board_name}!="SAF51003I", GOTO="end_ec_nic"
+
+ACTION=="add", SUBSYSTEM=="net", KERNELS=="0000:02:00.0", ENV{VYOS_IFNAME}="eth1",  ATTR{ifalias}="LAN1"
+ACTION=="add", SUBSYSTEM=="net", KERNELS=="0000:02:00.1", ENV{VYOS_IFNAME}="eth2",  ATTR{ifalias}="LAN2"
+ACTION=="add", SUBSYSTEM=="net", KERNELS=="0000:02:00.2", ENV{VYOS_IFNAME}="eth3",  ATTR{ifalias}="LAN3"
+ACTION=="add", SUBSYSTEM=="net", KERNELS=="0000:02:00.3", ENV{VYOS_IFNAME}="eth4",  ATTR{ifalias}="LAN4"
+ACTION=="add", SUBSYSTEM=="net", KERNELS=="0000:05:00.0", ENV{VYOS_IFNAME}="eth5",  ATTR{ifalias}="LAN5"
+ACTION=="add", SUBSYSTEM=="net", KERNELS=="0000:05:00.1", ENV{VYOS_IFNAME}="eth6",  ATTR{ifalias}="LAN6"
+ACTION=="add", SUBSYSTEM=="net", KERNELS=="0000:05:00.2", ENV{VYOS_IFNAME}="eth7",  ATTR{ifalias}="LAN7"
+ACTION=="add", SUBSYSTEM=="net", KERNELS=="0000:05:00.3", ENV{VYOS_IFNAME}="eth8",  ATTR{ifalias}="LAN8"
+ACTION=="add", SUBSYSTEM=="net", KERNELS=="0000:08:00.0", ENV{VYOS_IFNAME}="eth9",  ATTR{ifalias}="DMZ"
+ACTION=="add", SUBSYSTEM=="net", KERNELS=="0000:08:00.1", ENV{VYOS_IFNAME}="eth10", ATTR{ifalias}="WAN"
+
+LABEL="end_ec_nic"
+
+'''
diff --git a/data/build-flavors/iso.toml b/data/build-flavors/iso.toml
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+# Generic (aka "universal") ISO image
+
+image_format = "iso"
+
+# Include these packages in the image regardless of the architecture
+packages = [
+  # QEMU and Xen guest tools exist for multiple architectures
+  "qemu-guest-agent",
+  "vyos-xe-guest-utilities",
+]
+
+[architectures.amd64]
+  # Hyper-V and VMware guest tools are x86-only
+  packages = ["hyperv-daemons", "vyos-1x-vmware"]
diff --git a/data/build-flavors/xcpng.toml b/data/build-flavors/xcpng.toml
new file mode 100644
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+# Installation ISO for the XCP-ng virtualization platform
+
+image_formats = "iso"
+
+# Include these packages in the image
+packages = ["xe-guest-utilities"]