The source here is already patched
cd into source and run

make -f unix/Makefile LOCAL_UNZIP=-D_FILE_OFFSET_BITS=64 linux

Then run as root

mkdir -p /usr/local/unzip-patched/
make prefix=/usr/local/unzip-patched/ install

create script in /usr/local/bin

--- cut: grunzip --------
#!/bin/sh
export LC_CTYPE=el_GR; /usr/local/unzip-patched/bin/unzip -O cp737 $1 $2 

echo " "
echo " "
echo "After you unzip, if you do not see the file names in Greek,"
echo "you need to run: convmv --notest -f iso-8859-7 -t utf8 *"
echo " "
echo " "
-------------------------

commands such as grunzip -t file.zip and grunzip file.zip are supported.

