libxslt-1.1.16

1. ./configure --prefix=/sw
2. make
3. make install DESTDIR=/tmp/build.build/root-libxslt-1.1.16-1

Step 3 crashes:

chmod 644 /tmp/build.build/root-libxslt-1.1.16-1/sw/lib/libxslt.a
ranlib /tmp/build.build/root-libxslt-1.1.16-1/sw/lib/libxslt.a
libtool: install: warning: remember to run `libtool --finish /sw/lib'
make  install-exec-hook
/bin/sh ../mkinstalldirs "/sw/lib/libxslt-plugins"
mkdir -p -- /sw/lib/libxslt-plugins
mkdir: /sw/lib/libxslt-plugins: Permission denied
make[3]: *** [install-exec-hook] Error 1
make[2]: *** [install-exec-am] Error 2
make[1]: *** [install-am] Error 2
make: *** [install-recursive] Error 1
### execution of make failed, exit code 2

My /sw is not writable, but that shouldn't matter because I pass DESTDIR to cause installation in a temp hierarchy location that is writable. Looks like libxslt/Makefile.am install-exec-hook is missing a $(DESTDIR)