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):$(PATH)" \
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<tr><td><span title='2023-09-17 16:22:03 -0400'>2023-09-17</span></td><td><a href='/guix/commit/gnu/packages/mingw.scm?id=a6170fcd2ba1b4b677399f048bdcd7a5701775af'>gnu: Remove extraneous imports.</a><span class='msg-avail'>...<span class='msg-tooltip'>Found by running 'guild compile -W3 gnu/packages/$module.scm', using guild
from the upcoming Guile.

* gnu/packages/admin.scm: Remove extraneous imports.
* gnu/packages/avr.scm: Likewise.
* gnu/packages/base.scm: Likewise.
* gnu/packages/bootloaders.scm: Likewise.
* gnu/packages/firmware.scm: Likewise.
* gnu/packages/linphone.scm: Likewise.
* gnu/packages/telephony.scm: Likewise.
* gnu/packages/cran.scm: Likewise.
* gnu/packages/kde.scm: Likewise.
* gnu/packages/libcanberra.scm: Likewise.
* gnu/packages/libreoffice.scm: Likewise.
* gnu/packages/mes.scm: Likewise.
* gnu/packages/mingw.scm: Likewise.
* gnu/packages/serialization.scm: Likewise.
* gnu/packages/sync.scm: Likewise.
* gnu/packages/syncthing.scm: Likewise.
* gnu/packages/terminals.scm: Likewise.
* gnu/packages/version-control.scm: Likewise.
* gnu/packages/video.scm: Likewise.
* gnu/packages/wm.scm: Likewise.
* gnu/packages/emulators.scm: Likewise.

Reviewed-by: Ludovic Courtès &lt;ludo@gnu.org&gt;
</span></span></td><td>Maxim Cournoyer</td></tr>
<tr><td><span title='2023-08-18 10:19:14 +0200'>2023-08-18</span></td><td><a href='/guix/commit/gnu/packages/mingw.scm?id=78f080e25bfc02abd9a8fa88c8ad8d5854f54743'>gnu: mingw-w64-tools: Update to 11.0.1.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/mingw.scm (mingw-w64-tools): Update to 11.0.1.

Signed-off-by: Andreas Enge &lt;andreas@enge.fr&gt;
</span></span></td><td>fanquake</td></tr>
<tr><td><span title='2023-08-18 10:18:53 +0200'>2023-08-18</span></td><td><a href='/guix/commit/gnu/packages/mingw.scm?id=43feef1753b0a2db9f28212404ea00528808a006'>gnu: mingw-w64: Update to 11.0.1.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/mingw.scm (make-mingw-w64): Update to 11.0.1.

Signed-off-by: Andreas Enge &lt;andreas@enge.fr&gt;
</span></span></td><td>fanquake</td></tr>
<tr><td><span title='2023-07-18 20:23:42 +0800'>2023-07-18</span></td><td><a href='/guix/commit/gnu/packages/mingw.scm?id=f610821edae47611ce534afe0659a83f8479cd75'>gnu: mingw-w64-tools: Update to 11.0.0.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/mingw.scm (mingw-w64-tools): Update to 11.0.0.

Signed-off-by: 宋文武 &lt;iyzsong@member.fsf.org&gt;
</span></span></td><td>fanquake</td></tr>
<tr><td><span title='2023-07-18 20:23:42 +0800'>2023-07-18</span></td><td><a href='/guix/commit/gnu/packages/mingw.scm?id=30403c7c3fa9f700edc11fb6584590a68f26b1a5'>gnu: mingw: Update to 11.0.0.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/mingw.scm (mingw): Update to 11.0.0.

Signed-off-by: 宋文武 &lt;iyzsong@member.fsf.org&gt;
</span></span></td><td>fanquake</td></tr>