Install everything in PREFIX, set EXTRA_PATH to find it there.

--- ./Makefile.in~	2016-02-06 01:29:16.595090365 +0100
+++ ./Makefile.in	2016-02-06 09:29:04.286008931 +0100
@@ -133,9 +133,9 @@
 # require for testing here (like TCLX_LIBRARY).
 #========================================================================

-EXTRA_PATH	= $(top_builddir):$(TCL_BIN_DIR)
+EXTRA_PATH	= $(top_builddir):$(TCL_BIN_DIR):$(libdir)
 #EXTRA_PATH     = $(top_builddir):$(TCL_BIN_DIR):$(TK_BIN_DIR)
-TCLLIBPATH      = $(top_builddir)
+TCLLIBPATH      = $(pkglibdir)
 TCLSH_ENV	= TCL_LIBRARY=`@CYGPATH@ $(TCL_SRC_DIR)/library` \
 		  @LD_LIBRARY_PATH_VAR@="$(EXTRA_PATH):$(@LD_LIBRARY_PATH_VAR@)" \
 		  PATH="$(EXTRA_PATH):$(PATH)" \
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<div class='path'>path: <a href='/guix/log/?id=13a4368b46e57d25c6a1804733337c4e26fe99fe'>root</a>/<a href='/guix/log/gnu?id=13a4368b46e57d25c6a1804733337c4e26fe99fe'>gnu</a>/<a href='/guix/log/gnu/installer?id=13a4368b46e57d25c6a1804733337c4e26fe99fe'>installer</a>/<a href='/guix/log/gnu/installer/services.scm?id=13a4368b46e57d25c6a1804733337c4e26fe99fe'>services.scm</a></div><div class='content'><table class='list nowrap'><tr class='nohover'><th class='left'>Age</th><th class='left'>Commit message (<a href='/guix/log/gnu/installer/services.scm?id=13a4368b46e57d25c6a1804733337c4e26fe99fe&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2023-07-06 15:38:58 +0200'>2023-07-06</span></td><td><a href='/guix/commit/gnu/installer/services.scm?id=961ffca1c75141cbb351d143b22b673638e9659d'>installer: Restore LatGrkCyr-8x16 console font depending on language.</a><span class='msg-avail'>...<span class='msg-tooltip'>Partially-Fixes: &lt;https://issues.guix.gnu.org/64006&gt;

* gnu/installer/services.scm (system-services-&gt;configuration): When the
LANGUAGE environment variable matches a known native console font, wrap the
base services with modify-services, configuring console-font-service-type to
set the native console font on every tty instead of the default console font.

Signed-off-by: Florian Pelz &lt;pelzflorian@pelzflorian.de&gt;
</span></span></td><td>Denys Nykula</td></tr>
<tr><td><span title='2022-11-20 23:20:31 +0100'>2022-11-20</span></td><td><a href='/guix/commit/gnu/installer/services.scm?id=8c7ea71344b91c2c36dfbf6f2bc6daf559b1c696'>installer: Add comment above the 'packages' field.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/installer/services.scm (system-services-&gt;configuration): Add
heading above the 'packages' field.  Rename 'heading' to
'service-heading'.
</span></span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2022-08-08 11:54:25 +0200'>2022-08-08</span></td><td><a href='/guix/commit/gnu/installer/services.scm?id=ff9522fb69b9f4a31a5b766029e26dc53a2d1cf8'>installer: Add comments and vertical space to the generated config.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/installer/parted.scm (user-partitions-&gt;configuration): Introduce
vertical space and a comment.
* gnu/installer/services.scm (G_): New macro.
(%system-services): Add comment for OpenSSH.
(system-services-&gt;configuration): Add vertical space and comments.
* gnu/installer/user.scm (users-&gt;configuration): Add comment.
* gnu/installer/steps.scm (format-configuration): Add comment.
(configuration-&gt;file): Expound leading comment.  Pass #:format-comment
to 'pretty-print-with-comments/splice'.
</span></span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2021-12-28 15:26:39 -0500'>2021-12-28</span></td><td><a href='/guix/commit/gnu/installer/services.scm?id=0d9d151424ab5823e441f056237819277b8aa072'>installer: Offer 'gpm-service-type' for non-graphical systems.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/installer/services.scm (%system-services): Add the gpm-service-type.
</span></span></td><td>Leo Famulari</td></tr>
<tr><td><span title='2021-12-28 15:26:39 -0500'>2021-12-28</span></td><td><a href='/guix/commit/gnu/installer/services.scm?id=2842a42b518227607fed4470b0de1c84e3511beb'>installer: Recommend 'ntp-service-type' for non-graphical systems.</a><span class='msg-avail'>...<span class='msg-tooltip'>We had several bug reports with a root cause of "the clock was
incorrect" from users who used the installer to install a non-graphical
Guix System.

* gnu/installer/services.scm (%system-services): Add the ntp-service-type.
* gnu/installer/newt/services.scm (run-system-administration-cbt-page): New
variable.
(run-services-page): Use run-system-administration-cbt-page when not
installing a desktop.
* gnu/installer/tests.scm (choose-services): Add and use a
choose-misc-service?  procedure.
* gnu/tests/install.scm (installation-target-os-for-gui-tests)&lt;services&gt;: Add
ntp-service-type.
</span></span></td><td>Leo Famulari</td></tr>