Thanks - unfortunatelly I got stuck here:
$ make nconfig
HOSTCC scripts/basic/fixdep
HOSTCC scripts/kconfig/nconf.o
In file included from scripts/kconfig/nconf.c:15:
scripts/kconfig/nconf.h:18:10: fatal error: curses.h: No such file or directory
18 | #include <curses.h>
| ^~~~~~~~~~
compilation terminated.
make[1]: *** [scripts/Makefile.host:107: scripts/kconfig/nconf.o] Error 1
make: *** [Makefile:515: nconfig] Error 2