README: update win32 build insns
diff --git a/README b/README
index f27a890..d7d6d1f 100644
--- a/README
+++ b/README
@@ -15,6 +15,7 @@ Basic *nix build instructions:
Basic WIN32 build instructions (on Fedora 13; requires mingw32):
./autogen.sh
+ rm -f mingw32-config.cache
MINGW32_CFLAGS="-O3 -Wall -msse2" mingw32-configure
make
./mknsis.sh