Oops! I tried it with just LIB_INSTALL_DIR, and you are correct. I've
attached a patch fixing that.

David

On Tue, May 5, 2015 at 3:05 PM, Ludovic Courtès <ludo@gnu.org> wrote:

> David Hashe <david.hashe@dhashe.com> skribis:
>
> > From 65ea73868e3374d56793cde163172ad9749fe3af Mon Sep 17 00:00:00 2001
> > From: David Hashe <david.hashe@dhashe.com>
> > Date: Tue, 5 May 2015 01:48:28 -0500
> > Subject: [PATCH] gnu: webkitgtk: Fix compilation on x86_64.
> >
> > * gnu/packages/webkit.scm (webkitgtk): Move library install path from
> lib64 to
> >  lib.
>
> Applied.
>
> [...]
>
> > -       #:configure-flags '("-DPORT=GTK")))
> > +       #:configure-flags (list
> > +                          "-DPORT=GTK"
> > +                          (string-append ; uses lib64 by default
> > +                           "-DLIB_INSTALL_DIR="
> > +                           (assoc-ref %outputs "out") "/lib"))
> > +       #:make-flags '("lib=lib"))) ; uses lib64 by default
>
> Do you know if both are actually needed?  I would expect LIB_INSTALL_DIR
> to be sufficient.
>
> Thank you!
>
> Ludo’.
>