I'm upgrading my mingw32 ruby from 1.8.1 to the latest 1.9.0 snapshot. 
The configure, make, and make test steps went fine, and I can run ruby 
from the build dir:

$ ruby -v
ruby 1.9.0 (2004-07-10) [i386-mingw32]

However, make install is not working. It quickly (_too_ quickly) runs 
through the usual list of installs:

./miniruby.exe ./instruby.rb --dest-dir="" --make="make" --mflags="- 
--unix" --make-flags=" --unix" --mantype="man"
install -c -p -m 0755 ruby.exe /usr/local/bin/ruby.exe
install -c -p -m 0755 rubyw.exe /usr/local/bin
install -c -p -m 0755 msvcrt-ruby19.dll /usr/local/bin
install -c -p -m 0755 libmsvcrt-ruby19.dll.a /usr/local/lib

and so on.

But nothing actually gets copied to /usr/local or to anywhere else in my 
msys tree, for that matter (verified with find and with the windows 
search util). There are no error messages.

If I run one of the install lines by itself, it works fine.

I put some tests in instruby.rb to make sure that $dryrun is not set, 
and it's not.

Interestingly, the rdoc stuff _did_ install properly in 
/usr/local/share/ri/1.9/system/. It's just the bin/ and lib/ files that 
didn't make it.

Any ideas? Why is make install failing silently?