I am trying to build Firebird on win32 with cygwin. I have follow
all the instructions but when I run the build_lib.bat file I get the
following:

MAKE Version 5.2 Copyright (c) 1987, 2000 Borland
Microsoft C Compiler
Building SERVER gds32.dll
copy blf.e blf_tmp.e
1 file(s) copied.
..\expand_dbs blf_tmp.e
Expanding DB in... blf_tmp.e
1 file(s) copied.
/home/Administrator/FBInst\bin\gpre.exe -n -manual -raw
blf_tmp.e blf.c

Fatal: Unable to execute
command: /home/Administrator/FBInst\bin\gpre.exe

I've tried to fix include.mak to use /bin/gpre.exe but that doesn't
work either. Any suggestions?