scrollkeeper 3.11 (and some previous versions also) won't emerge when used with -nls when gettext is built with -nls also. it dies on this: error.c:25: libintl.h: No such file or directory apparently scrollkeeper depends on gettext with nls support even when scrollkeeper itself isn't built with nls
Emerge rsync in a couple of hours and try again. Fix is to touch ${S}/intl/libintl.h if "nls" is not in USE.