diff -up ./install.sh.src.orig ./install.sh.src
--- ./install.sh.src.orig	2015-09-02 14:39:32.011146045 +1000
+++ ./install.sh.src	2015-09-02 14:40:31.756148173 +1000
@@ -76,7 +76,7 @@ install -d "$DESTDIR${PREFIX_SHARE}/bash
 install -d "$DESTDIR${PREFIX_SHARE}/fish/completions"
 install -d "$DESTDIR${PREFIX_SHARE}/doc/0install"
 install -d "$DESTDIR${PREFIX}/${ZSHFUNCTIONS}"
-install -d "$DESTDIR${PREFIX}/lib/0install.net"
+install -d "$DESTDIR${PREFIX}/lib64/0install.net"
 
 install -m 0644 ${DOCS} "$DESTDIR${PREFIX_SHARE}/doc/0install/"
 install -m 0644 ${MANPAGES} "$DESTDIR${PREFIX_MAN}/man1/"
@@ -93,7 +93,7 @@ install -m 0755 share/0install.net/unlzm
 install -m 0755 share/0install.net/unxz "$DESTDIR${PREFIX_SHARE}/0install.net/"
 
 if [ -n "$PLUGINS" ]; then
-  install -m 0644 $PLUGINS "$DESTDIR${PREFIX}/lib/0install.net/"
+  install -m 0644 $PLUGINS "$DESTDIR${PREFIX}/lib64/0install.net/"
 fi
 
 for size in 24x24 48x48 128x128 scalable; do \
diff -up ./ocaml/Makefile.orig ./ocaml/Makefile
diff -up ./ocaml/zeroinstall/gui.ml.orig ./ocaml/zeroinstall/gui.ml
--- ./ocaml/zeroinstall/gui.ml.orig	2015-09-02 14:32:01.260129993 +1000
+++ ./ocaml/zeroinstall/gui.ml	2015-09-02 14:34:51.351136051 +1000
@@ -337,7 +337,7 @@ let try_get_gui config ~use_gui =
             if system#file_exists plugin_path then Some plugin_path else None in
 
           let plugin_path =
-            let sys_lib = Filename.dirname bindir +/ "lib" in
+            let sys_lib = Filename.dirname bindir +/ "lib64" in
             U.first_match check_plugin_dir [
               (* Was 0install installed with opam? *)
               sys_lib +/ "0install";