I did it for nixpkgs too :-)
From 6c9ea521e88d36bd1ce990a561477ec0e2950017 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E5=AE=8B=E6=96=87=E6=AD=A6?= <iyzs...@gmail.com>
Date: Thu, 12 Nov 2015 13:31:19 +0800
Subject: [PATCH] tk: Hardcode path to TK_LIBRARY.
Fixes <http://bugs.gnu.org/20889>.
* gnu/packages/patches/tk-find-library.patch: New patch.
* gnu-system.am (dist_patch_DATA): Add it.
* gnu/packages/tcl.scm (tk)[source]: Add patch.
---
gnu-system.am | 1 +
gnu/packages/patches/tk-find-library.patch | 30 ++++++++++++++++++++++++++++++
gnu/packages/tcl.scm | 3 ++-
3 files changed, 33 insertions(+), 1 deletion(-)
create mode 100644 gnu/packages/patches/tk-find-library.patch
diff --git a/gnu-system.am b/gnu-system.am
index 0b716c7..e7c1b7f 100644
--- a/gnu-system.am
+++ b/gnu-system.am
@@ -662,6 +662,7 @@ dist_patch_DATA = \
gnu/packages/patches/texi2html-document-encoding.patch \
gnu/packages/patches/texi2html-i18n.patch \
gnu/packages/patches/tidy-CVE-2015-5522+5523.patch \
+ gnu/packages/patches/tk-find-library.patch \
gnu/packages/patches/torsocks-dns-test.patch \
gnu/packages/patches/tvtime-gcc41.patch \
gnu/packages/patches/tvtime-pngoutput.patch \
diff --git a/gnu/packages/patches/tk-find-library.patch b/gnu/packages/patches/tk-find-library.patch
new file mode 100644
index 0000000..89c4781
--- /dev/null
+++ b/gnu/packages/patches/tk-find-library.patch
@@ -0,0 +1,30 @@
+This patch hardcode where Tk found its script library 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
diff --git a/gnu/packages/tcl.scm b/gnu/packages/tcl.scm
index 5b55ccc..c18b8b5 100644
--- a/gnu/packages/tcl.scm
+++ b/gnu/packages/tcl.scm
@@ -140,7 +140,8 @@ X11 GUIs.")
version "/tk" version "-src.tar.gz"))
(sha256
(base32
- "1h96vp15zl5xz0d4qp6wjyrchqmrmdm3q5k22wkw9jaxbvw9vy88"))))
+ "1h96vp15zl5xz0d4qp6wjyrchqmrmdm3q5k22wkw9jaxbvw9vy88"))
+ (patches (list (search-patch "tk-find-library.patch")))))
(build-system gnu-build-system)
(arguments
'(#:phases (modify-phases %standard-phases
--
2.6.2
