Please describe the problem:
The generated Makefile in version 1.1.17's libxslt/ subdirectory contains a target named install-exec-hook (forth-last line of the file) which looks like this:

    $(mkinstalldirs) "$(libdir)/libxslt-plugins"

It should look like this:

    $(mkinstalldirs) "$(DESTDIR)$(libdir)/libxslt-plugins"

Steps to reproduce:
1. gmake install DESTDIR=/some/path

Actual results:
gmake fails:
/bin/bash ../mkinstalldirs "/usr/local/lib/libxslt-plugins"
mkdir -p -- /usr/local/lib/libxslt-plugins
mkdir: "/usr/local/lib/libxslt-plugins": Permission denied
gmake[3]: *** [install-exec-hook] Error 2

(since I'm building as a regular user, I have no permission to write to /usr/local)

Expected results:
The path should be prefixed with DESTDIR

Does this happen every time?
Yes

Other information: