This patch hard-codes the Tk library directory during package initialization.

See <http://core.tcl.tk/tk/tktview/765642ffffffffffffff>.

diff --git a/generic/tkWindow.c b/generic/tkWindow.c
index b5cbbab..96b5501 100644
--- a/generic/tkWindow.c
+++ b/generic/tkWindow.c
@@ -988,6 +988,7 @@ TkCreateMainWindow(
 
     Tcl_SetVar2(interp, "tk_patchLevel", NULL, TK_PATCH_LEVEL, TCL_GLOBAL_ONLY);
     Tcl_SetVar2(interp, "tk_version",    NULL, TK_VERSION,     TCL_GLOBAL_ONLY);
+    Tcl_SetVar2(interp, "tk_library",    NULL, TK_LIBRARY,     TCL_GLOBAL_ONLY);
 
     tsdPtr->numMainWindows++;
     return tkwin;
diff --git a/unix/Makefile.in b/unix/Makefile.in
index f21fdbb..c61b0df 100644
--- a/unix/Makefile.in
+++ b/unix/Makefile.in
@@ -1029,7 +1029,7 @@ tkVisual.o: $(GENERIC_DIR)/tkVisual.c
 	$(CC) -c $(CC_SWITCHES) $(GENERIC_DIR)/tkVisual.c
 
 tkWindow.o: $(GENERIC_DIR)/tkWindow.c
-	$(CC) -c $(CC_SWITCHES) $(GENERIC_DIR)/tkWindow.c
+	$(CC) -c $(CC_SWITCHES) -DTK_LIBRARY=\"${TK_LIBRARY}\" $(GENERIC_DIR)/tkWindow.c
 
 tkButton.o: $(GENERIC_DIR)/tkButton.c
 	$(CC) -c $(CC_SWITCHES) $(GENERIC_DIR)/tkButton.c
 href='/guix/refs/?id=7c990fbcb3aa291189d4e453b92ee1a208dfc5d1'>refs</a><a class='active' href='/guix/log/gnu/system/linux-container.scm'>log</a><a href='/guix/tree/gnu/system/linux-container.scm?id=7c990fbcb3aa291189d4e453b92ee1a208dfc5d1'>tree</a><a href='/guix/commit/gnu/system/linux-container.scm?id=7c990fbcb3aa291189d4e453b92ee1a208dfc5d1'>commit</a><a href='/guix/diff/gnu/system/linux-container.scm?id=7c990fbcb3aa291189d4e453b92ee1a208dfc5d1'>diff</a></td><td class='form'><form class='right' method='get' action='/guix/log/gnu/system/linux-container.scm'>
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<div class='path'>path: <a href='/guix/log/?id=7c990fbcb3aa291189d4e453b92ee1a208dfc5d1'>root</a>/<a href='/guix/log/gnu?id=7c990fbcb3aa291189d4e453b92ee1a208dfc5d1'>gnu</a>/<a href='/guix/log/gnu/system?id=7c990fbcb3aa291189d4e453b92ee1a208dfc5d1'>system</a>/<a href='/guix/log/gnu/system/linux-container.scm?id=7c990fbcb3aa291189d4e453b92ee1a208dfc5d1'>linux-container.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/system/linux-container.scm?id=7c990fbcb3aa291189d4e453b92ee1a208dfc5d1&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2021-01-13 22:24:18 +0100'>2021-01-13</span></td><td><a href='/guix/commit/gnu/system/linux-container.scm?id=0d22fc8d36e4efba9748c94cab7cedbbe2bbb5bf'>services: shepherd: 'shepherd-service-type' requires documentation.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/services/shepherd.scm (shepherd-service-type): Require a
'description' form.
* gnu/services/base.scm (root-file-system-service-type)
(rngd-service-type, host-name-service-type):
(virtual-terminal-service-type, console-keymap-service-type)
(syslog-service-type, swap-service-type)
(kmscon-service-type): Add description.
* gnu/services/networking.scm (dhcp-client-service-type): Likewise.
* gnu/system/install.scm (cow-store-service-type): Likewise.
* gnu/system/linux-container.scm (dummy-networking-service-type):
Likewise.
* gnu/system/mapped-devices.scm (device-mapping-service-type):
Likewise.
* tests/guix-system.sh: Likewise.
</span></span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2020-10-01 09:27:33 +0200'>2020-10-01</span></td><td><a href='/guix/commit/gnu/system/linux-container.scm?id=5627bfe45ce46f498979b4ad2deab1fdfed22b6c'>Instantiate nscd in each system container.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/system/linux-container.scm (%nscd-container-caches): New variable.
(containerized-operating-system): Instantiate nscd-service with smaller caches
and add it to the generated operating-system, replacing any nscd-service
specified by the caller.
* gnu/system/file-systems.scm: (%network-file-mappings): Remove "/var/run/nscd".

Signed-off-by: Mathieu Othacehe &lt;othacehe@gnu.org&gt;
</span></span></td><td>Jason Conroy</td></tr>
<tr><td><span title='2020-04-26 22:49:49 +0200'>2020-04-26</span></td><td><a href='/guix/commit/gnu/system/linux-container.scm?id=0e5c2d5e145118ec47329d6b3a534344d2e89cd3'>services: system: Initial entries are non-monadic.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/system.scm (operating-system-directory-base-entries): Return a
regular, non-monadic value.
* gnu/services.scm (system-derivation): Adjust accordingly.
* gnu/system/linux-container.scm (container-essential-services): Likewise.
</span></span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2020-01-06 12:20:21 +0200'>2020-01-06</span></td><td><a href='/guix/commit/gnu/system/linux-container.scm?id=c27710859c3cb59c439571ddc56cf71c36a1c33c'>system: linux-container: Recommend guix container.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/system/linux-container.scm (container-script)[script]: Recommend
using 'guix container' to get a shell inside the running container.
</span></span></td><td>Efraim Flashner</td></tr>