build failed disco and oean

when I build kernel oean and disco from soure tree 5.x.x

use the command fakeroot debian/rules binary-generic binary-header on x86_64 arch boards

the console says

in the '/root/eoan' directory.
/root/eoan/Makefile:1149: recipe for target 'prepare3' failed
make[3]: *** [prepare3] Error 1
/root/eoan/Makefile:344: recipe for target '__build_one_by_one' failed
make[2]: *** [__build_one_by_one] Error 2
make[2]: Leaving directory '/root/eoan/debian/build/build-generic'
Makefile:179: recipe for target 'sub-make' failed
make[1]: *** [sub-make] Error 2
make[1]: Leaving directory '/root/eoan'
debian/rules.d/2-binary-arch.mk:28: recipe for target '/root/eoan/debian/stamps/stamp-prepare-tree-generic' failed
make: *** [/root/eoan/debian/stamps/stamp-prepare-tree-generic] Error 2

can you tell me how to fix this problem?