installing pine on sparc

["Bruno Waes" <bruno.waes@oxygenetic.com>]

after apt-get installing pine4-src and pine4-diffs i did as read in the
README and dpkg-source -x created the source directory, inthere i did

debian/rules binary

but after a few seconds that quits with these last lines:

...
install bin/pine debian/tmp/usr/bin
install: bin/pine: no such file or directory
make[1]: *** [binaryPine] Error 1
make[1]: Leaving directory '/usr/src/pine4/pine4-4.21'
make: *** [binary-arch] Error 2

any idea what is wrong ?
thanks in advance

bruno