- ERROR: Win32::GUI is not installed

ERRORS/WARNINGS FOUND IN PREREQUISITES.  You may wish to install the versions
of the modules indicated above before proceeding with this installation

Checking whether your kit is complete...
Looks good

Checking prerequisites...
Creating new 'Build' script for 'Win32-Snarl' version '0.03'
Copying lib/Win32/Snarl.pm -> blib/lib/Win32/Snarl.pm
Manifying blib/lib/Win32/Snarl.pm -> blib/libdoc/Win32::Snarl.3
HTMLifying blib/lib/Win32/Snarl.pm -> blib/libhtml/site/lib/Win32/Snarl.html
t/Win32-Snarl....1..11

#   Failed test 'use Win32::Snarl;'
#   at t/Win32-Snarl.t line 9.
#     Tried to use 'Win32::Snarl'.
#     Error:  Can't locate Win32/GUI.pm in @INC (@INC contains: /Users/cpanrun/depot/main/contrib-patched/perl/CPAN/src/Win32-Snarl/blib/lib /Users/cpanrun/depot/main/contrib-patched/perl/CPAN/src/Win32-Snarl/blib/arch /Users/cpanrun/depot/main/Apps/CPAN_Run/lib /Users/cpanrun/build/5.10.0/site/lib /Users/cpanrun/build/5.10.0/lib . /Users/cpanrun/build/5.10.0/site/lib /Users/cpanrun/build/5.10.0/lib .) at /Users/cpanrun/depot/main/contrib-patched/perl/CPAN/src/Win32-Snarl/blib/lib/Win32/Snarl.pm line 12.
# BEGIN failed--compilation aborted at t/Win32-Snarl.t line 9.
# Compilation failed in require at (eval 3) line 2.
# BEGIN failed--compilation aborted at (eval 3) line 2.
not ok 1 - use Win32::Snarl;
Undefined subroutine &Win32::Snarl::GetVersion called at t/Win32-Snarl.t line 16.
# Looks like you planned 11 tests but only ran 1.
# Looks like you failed 1 test of 1 run.
# Looks like your test died just after 1.
dubious
	Test returned status 255 (wstat 65280, 0xff00)
DIED. FAILED tests 1-11
	Failed 11/11 tests, 0.00% okay
Failed Test     Stat Wstat Total Fail  List of Failed
-------------------------------------------------------------------------------
t/Win32-Snarl.t  255 65280    11   21  1-11
Failed 1/1 test scripts. 11/11 subtests failed.
Files=1, Tests=11,  1 wallclock secs ( 0.07 cusr +  0.03 csys =  0.10 CPU)
Failed 1/1 test programs. 11/11 subtests failed.