app-admin/prelude-manager has DEPEND on dev-libs/libxml but actually depends on dev-libs/libxml2. From the build log: $ grep xml /var/log/portage/app-admin:prelude-manager-0.9.9.1:20090814-074848.log checking for xml2-config... /usr/bin/xml2-config checking for libxml - version >= 2.0.0... yes (version 2.7.3) config.status: creating plugins/reports/xmlmod/Makefile Making all in xmlmod make[4]: Entering directory `/var/tmp/portage/app-admin/prelude-manager-0.9.9.1/work/prelude-manager-0.9.9.1/plugins/reports/xmlmod' if /bin/sh ../../../libtool --tag=CC --mode=compile x86_64-pc-linux-gnu-gcc -DHAVE_CONFIG_H -I. -I. -I../../.. -I../../../src/include -I../../../libmissing -I/usr/include/libxml2 -DPRELUDE_CONFIG_DIR=\"/etc/prelude\" -DIDMEF_DTD=\"/usr/share/prelude-manager/xmlmod/idmef-message.dtd\" -march=core2 -mtune=core2 -O2 -pipe -fweb -frename-registers -fomit-frame-pointer -fno-ident -ggdb -Wall -Wstrict-prototypes -Wmissing-prototypes -Wmissing-declarations -Wbad-function-cast -Wcast-qual -Wcast-align -Wnested-externs -Wunused -Wformat -Wformat-security -MT xmlmod.lo -MD -MP -MF ".deps/xmlmod.Tpo" -c -o xmlmod.lo xmlmod.c; \ then mv -f ".deps/xmlmod.Tpo" ".deps/xmlmod.Plo"; else rm -f ".deps/xmlmod.Tpo"; exit 1; fi x86_64-pc-linux-gnu-gcc -DHAVE_CONFIG_H -I. -I. -I../../.. -I../../../src/include -I../../../libmissing -I/usr/include/libxml2 -DPRELUDE_CONFIG_DIR=\"/etc/prelude\" -DIDMEF_DTD=\"/usr/share/prelude-manager/xmlmod/idmef-message.dtd\" -march=core2 -mtune=core2 -O2 -pipe -fweb -frename-registers -fomit-frame-pointer -fno-ident -ggdb -Wall -Wstrict-prototypes -Wmissing-prototypes -Wmissing-declarations -Wbad-function-cast -Wcast-qual -Wcast-align -Wnested-externs -Wunused -Wformat -Wformat-security -MT xmlmod.lo -MD -MP -MF .deps/xmlmod.Tpo -c xmlmod.c -fPIC -DPIC -o .libs/xmlmod.o /bin/sh ../../../libtool --tag=CC --mode=link x86_64-pc-linux-gnu-gcc -march=core2 -mtune=core2 -O2 -pipe -fweb -frename-registers -fomit-frame-pointer -fno-ident -ggdb -Wall -Wstrict-prototypes -Wmissing-prototypes -Wmissing-declarations -Wbad-function-cast -Wcast-qual -Wcast-align -Wnested-externs -Wunused -Wformat -Wformat-security -Wl,-O1 -Wl,--as-needed -Wl,-O1 -Wl,-z,relro -o xmlmod.la -rpath /usr/lib64/prelude-manager/reports -module -avoid-version xmlmod.lo -lxml2 -lz -lm
Done.
