libwx_baseu trouble rebuilding mingw32-nsis on Fedora 9 x86_64

[Eric Smith]

When I try to build NSIS, I get:

error: Failed build dependencies:
         /usr/lib/libwx_baseu-2.8.so is needed by 
mingw32-nsis-2.39-5.fc9.x86_64

I just installed yum install wxGTK.i386, and it didn't help.  I have
/usr/lib/libwx_baseu-2.8.so.0, but not just the .so, though I have the
.so for 64-bit:

$ ls -l /usr/lib*/libwx_baseu-2.8*
lrwxrwxrwx 1 root root      20 2008-10-27 18:59 
/usr/lib64/libwx_baseu-2.8.so -> libwx_baseu-2.8.so.0
lrwxrwxrwx 1 root root      24 2008-10-27 18:59 
/usr/lib64/libwx_baseu-2.8.so.0 -> libwx_baseu-2.8.so.0.5.0
-rwxr-xr-x 1 root root 1436264 2008-09-30 08:04 
/usr/lib64/libwx_baseu-2.8.so.0.5.0
lrwxrwxrwx 1 root root      24 2008-11-21 12:32 
/usr/lib/libwx_baseu-2.8.so.0 -> libwx_baseu-2.8.so.0.5.0
-rwxr-xr-x 1 root root 1370588 2008-09-30 08:04 
/usr/lib/libwx_baseu-2.8.so.0.5.0

Where is libws_baseu-2.8.so supposed to come from?  I tried creating the 
link by hand, but doing the rpmbuild *still* gives the same error.  This 
seems a bit mysterious to me.

Thanks!
Eric