source package build is failing

Trying to build the source package using sbuild is failing with the following error.

aclocal-1.15: warning: autoconf input should be named 'configure.ac', not 'configure.in'
 cd . && automake-1.15 --gnu
automake-1.15: warning: autoconf input should be named 'configure.ac', not 'configure.in'
configure.in:44: error: required file 'config/compile' not found
configure.in:44: 'automake --add-missing' can install 'compile'
configure.in:22: error: required file 'config/missing' not found
configure.in:22: 'automake --add-missing' can install 'missing'
automake-1.15: warning: autoconf input should be named 'configure.ac', not 'configure.in'
src/Makefile.am:3: warning: 'INCLUDES' is the old name for 'AM_CPPFLAGS' (or '*_CPPFLAGS')
src/Makefile.am: error: required file 'config/depcomp' not found
src/Makefile.am: 'automake --add-missing' can install 'depcomp'
tests/Makefile.am:15: warning: 'INCLUDES' is the old name for 'AM_CPPFLAGS' (or '*_CPPFLAGS')
Makefile:420: recipe for target 'Makefile.in' failed
make[1]: *** [Makefile.in] Error 1
make[1]: Leaving directory '/<<PKGBUILDDIR>>'
/usr/share/cdbs/1/class/makefile.mk:61: recipe for target 'debian/stamp-makefile-install' failed
make: *** [debian/stamp-makefile-install] Error 2
dpkg-buildpackage: error: fakeroot debian/rules binary gave error exit status 2