tested on my side, please append ~amd64 to KEYWORDS in ebuild
dosfstools 2.9 does not compile on my system: gcc -O2 -fomit-frame-pointer -Wall -c mkdosfs.c -o mkdosfs.o mkdosfs.c:107:3: #error _llseek system call not present The problem has been fixed in dosfstools 2.10 which compiles fine.
Done.