Hi, I already worked on this. You can check the patch here https://mail-index.netbsd.org/tech-kern/2024/03/30/msg029539.html > I've copied nullfs to fullfs. I did "make" and nothing happed, > I tried 'build.sh' and nothing, like 'fullfs' does not exist. Did you add fullfs to the Makefile(s)? -- IC