debian/ubuntu iPXE patching instructions

README.md

 # How to boot a diskless VM with iPXE over NFS using only IPv6
 
-I have encountered so many issues and countless hours trying to figure this out, but I finally succeeded. Reading source code, strace'ing binaries trying to figure out what was wrong with them.
+I have encountered many issues and countless hours trying to figure this out, but I finally succeeded. Reading source code, strace'ing binaries trying to figure out what was wrong with them.
 
 # iPXE
 iPXE will do IPv4 DHCP first and then IPv6 SLAAC/DHCP. This is not a problem, it's just annoying. IPv4 DHCP has a default timeout in iPXE of 10 seconds.
 * enable IPv6 -> `src/config/general.h` -> `#define NET_PROTO_IPV6`
 * mangle IPv4 DHCP timeout -> `src/config/dhcp.h` -> `#define DHCP_DISC_END_TIMEOUT_SEC 1`
 
+Debian/Ubuntu ipxe-qemu patching
+```
+apt-get update
+apt-get source ipxe-qemu
+apt-get build-dep ipxe-qemu
+cd ipxe-1.0.0+git-20180124.fbe8c52d # or whatever your version is
+dch -n "add support for serial console / IPv6"
+# apply the modifications above
+debuild -b -uc -us
+cd ..
+dpkg -i ipxe-qemu_*.deb
+```
+
 # Kernel options
 
 Make sure you pass the right kernel options for initramfs/initrd to know exactly what you want to do. (replace eth0 with the name of your PXE interface)