gdbm 1.8.3

[Luis Quesada]

Dear all,
I am getting the following error when trying to install gdbm under 
cygwin (1.5.25(0.156/4/2)):

===============================================
----------------------------------------------------------------------
Libraries have been installed in:
  /usr/local/lib

If you ever happen to want to link against installed libraries
in a given directory, LIBDIR, you must either use libtool, and
specify the full pathname of the library, or use the `-LLIBDIR'
flag during linking and do at least one of the following:
  - add LIBDIR to the `PATH' environment variable
    during execution
  - add LIBDIR to the `LD_RUN_PATH' environment variable
    during linking
  - use the `-Wl,--rpath -Wl,LIBDIR' linker flag

See any operating system documentation about shared libraries for
more information, such as the ld(1) and ld.so(8) manual pages.
----------------------------------------------------------------------
/usr/bin/install -c -m 644 -o bin -g bin gdbm.h \
               /usr/local/include/gdbm.h
/usr/bin/install: invalid user `bin'
make: *** [install] Error 1
===============================================

What am I doing wrong?
Cheers,
Luis