jbuild yep-xsl failed

jhbuild build yelp-xsl
*** Verificando itstool *** [1/2]
*** Omitiendo itstool (paquete y dependencias no actualizados) *** [1/2]
*** Verificando yelp-xsl *** [2/2]
git remote set-url origin git://git.gnome.org/yelp-xsl
git remote update origin
Fetching origin
git pull --rebase
Current branch master is up to date.
*** Configurando yelp-xsl *** [2/2]
./autogen.sh --prefix /opt/gnome --libdir '/opt/gnome/lib'  --disable-static --disable-gtk-doc
autoreconf: Entering directory `.'
autoreconf: configure.ac: not using Gettext
autoreconf: running: aclocal --force -I m4 ${ACLOCAL_FLAGS}
autoreconf: configure.ac: tracing
autoreconf: configure.ac: not using Libtool
autoreconf: running: /opt/gnome/bin/autoconf --force
autoreconf: configure.ac: not using Autoheader
autoreconf: running: automake --add-missing --copy --force-missing
doc/yelp-xsl/Makefile.am:12: filter-out %db2html-suppressed.xsl,            \
doc/yelp-xsl/Makefile.am:12:    $(sort $(patsubst ./%, %,                   \
doc/yelp-xsl/Makefile.am:12:      $(foreach dir,$(xsldoc_dirs: non-POSIX variable name
doc/yelp-xsl/Makefile.am:12: (probably a GNU make extension)
doc/yelp-xsl/Makefile.am:12: wildcard $(dir: non-POSIX variable name
doc/yelp-xsl/Makefile.am:12: (probably a GNU make extension)
doc/yelp-xsl/Makefile.am:15: sort $(foreach xsl,$(xsldoc_xsls: non-POSIX variable name
doc/yelp-xsl/Makefile.am:15: (probably a GNU make extension)
doc/yelp-xsl/Makefile.am:15: basename $(notdir $(xsl: non-POSIX variable name
doc/yelp-xsl/Makefile.am:15: (probably a GNU make extension)
doc/yelp-xsl/Makefile.am:16: patsubst %, C/%.page, $(xsldoc_base: non-POSIX variable name
doc/yelp-xsl/Makefile.am:16: (probably a GNU make extension)
doc/yelp-xsl/Makefile.am:24: filter %/$(basename $(notdir $@: non-POSIX variable name
doc/yelp-xsl/Makefile.am:24: (probably a GNU make extension)
doc/yelp-xsl/Makefile.am:36: wildcard C/*.page: non-POSIX variable name
doc/yelp-xsl/Makefile.am:36: (probably a GNU make extension)
xslt/docbook/html/Makefile.am:30: wildcard db*.xsl: non-POSIX variable name
xslt/docbook/html/Makefile.am:30: (probably a GNU make extension)
autoreconf: Leaving directory `.'
configure: WARNING: unrecognized options: --disable-static, --disable-gtk-doc
checking for a BSD-compatible install... /home/shakaran/.local/bin/install-check
checking whether build environment is sane... yes
checking for a thread-safe mkdir -p... /bin/mkdir -p
checking for gawk... gawk
checking whether make sets $(MAKE)... yes
checking for gawk... (cached) gawk
checking for itstool... itstool
checking for pkg-config... /opt/gnome/bin/pkg-config
checking pkg-config is at least version 0.9.0... yes
checking for YELP_XSL... no
configure: error: Package requirements (
    libxml-2.0 >= 2.6.12
    libxslt    >= 1.1.8
) were not met:

No package 'libxml-2.0' found
No package 'libxslt' found

Consider adjusting the PKG_CONFIG_PATH environment variable if you
installed software in a non-standard prefix.

Alternatively, you may set the environment variables YELP_XSL_CFLAGS
and YELP_XSL_LIBS to avoid the need to call pkg-config.
See the pkg-config man page for more details.
*** Error durante la fase configure de yelp-xsl: ########## Error de ejecución ./autogen.sh --prefix /opt/gnome --libdir '/opt/gnome/lib'  --disable-static --disable-gtk-doc  *** [2/2]