you are in this directory? apps/gpl/mkfwimage/src
and you apply the patches?
Yes , I was in the directory apps/gpl/mkfwimage/src
I applied the patch
I download the files beta3
and I execute this command
mkfwimage -i lx2-8.txt -v XS2.ar2316.OpenWRT-kamikaze -o nightwing_v0.6beta3-picostation2-squashfs.bin
-bash: mkfwimage: command not found