gutenprint-5.1.4 (cvs) — не получается скомпилить :((

Убунта 7.04. Пыьась собрать gutenprint и в процессе компиляции выдаёт ошибку:

Making all in gutenprintui2
make[3]: Entering directory `/media/sdc9/gutenprint-5.0.0/src/gutenprintui2'
/bin/bash ../../libtool --tag=CC --mode=compile gcc -DHAVE_CONFIG_H -I. -I../.. -I../../include -I../../include -Wall -Wcast-align -Wstrict-prototypes -Wmissing-prototypes -Wmissing-declarations -Wnested-externs -Wwrite-strings -Werror-implicit-function-declaration -Winline -Wformat=2 -finline-limit=1048576 -Disfinite=finite -O6 -I/usr/include/gtk-2.0 -I/usr/lib/gtk-2.0/include -I/usr/include/atk-1.0 -I/usr/include/cairo -I/usr/include/pango-1.0 -I/usr/include/glib-2.0 -I/usr/lib/glib-2.0/include -I/usr/include/freetype2 -I/usr/include/libpng12 -Disfinite=finite -O6 -MT libgutenprintui2_la-printrcl.lo -MD -MP -MF .deps/libgutenprintui2_la-printrcl.Tpo -c -o libgutenprintui2_la-printrcl.lo `test -f 'printrcl.c' || echo './'`printrcl.c
gcc -DHAVE_CONFIG_H -I. -I../.. -I../../include -I../../include -Wall -Wcast-align -Wstrict-prototypes -Wmissing-prototypes -Wmissing-declarations -Wnested-externs -Wwrite-strings -Werror-implicit-function-declaration -Winline -Wformat=2 -finline-limit=1048576 -Disfinite=finite -O6 -I/usr/include/gtk-2.0 -I/usr/lib/gtk-2.0/include -I/usr/include/atk-1.0 -I/usr/include/cairo -I/usr/include/pango-1.0 -I/usr/include/glib-2.0 -I/usr/lib/glib-2.0/include -I/usr/include/freetype2 -I/usr/include/libpng12 -Disfinite=finite -O6 -MT libgutenprintui2_la-printrcl.lo -MD -MP -MF .deps/libgutenprintui2_la-printrcl.Tpo -c printrcl.c -fPIC -DPIC -o .libs/libgutenprintui2_la-printrcl.o
In file included from /usr/include/gtk-2.0/gtk/gtkactiongroup.h:34,
from /usr/include/gtk-2.0/gtk/gtk.h:38,
from ../../include/gutenprintui2/gutenprintui.h:41,
from printrcl.l:30:
/usr/include/gtk-2.0/gtk/gtkitemfactory.h:50: warning: function declaration isn't a prototype
printrcl.l: In function 'yylex':
printrcl.l:107: error: 'yylval' undeclared (first use in this function)
printrcl.l:107: error: (Each undeclared identifier is reported only once
printrcl.l:107: error: for each function it appears in.)
printrcl.c: At top level:
printrcl.c:1968: warning: no previous prototype for 'yyget_lineno'
printrcl.c:1977: warning: no previous prototype for 'yyget_in'
printrcl.c:1985: warning: no previous prototype for 'yyget_out'
printrcl.c:1993: warning: no previous prototype for 'yyget_leng'
printrcl.c:2002: warning: no previous prototype for 'yyget_text'
printrcl.c:2011: warning: no previous prototype for 'yyset_lineno'
printrcl.c:2023: warning: no previous prototype for 'yyset_in'
printrcl.c:2028: warning: no previous prototype for 'yyset_out'
printrcl.c:2033: warning: no previous prototype for 'yyget_debug'
printrcl.c:2038: warning: no previous prototype for 'yyset_debug'
printrcl.c:2072: warning: no previous prototype for 'yylex_destroy'
make[3]: *** [libgutenprintui2_la-printrcl.lo] Ошибка 1
make[3]: Leaving directory `/media/sdc9/gutenprint-5.0.0/src/gutenprintui2'
make[2]: *** [all-recursive] Ошибка 1
make[2]: Leaving directory `/media/sdc9/gutenprint-5.0.0/src'
make[1]: *** [all-recursive] Ошибка 1
make[1]: Leaving directory `/media/sdc9/gutenprint-5.0.0'
make: *** [all] Ошибка 2

Советовали поставить flex, но он присутствует в системе. Есть ещё варианты, чего ему не хватает? :((