This patch replaces the environment variable "GTK_IM_MODULE" with
"GUIX_GTK3_IM_MODULE_FILE" to prevent this version of GTK+ from loading input
method modules for other major versions of GTK+.

--- gtk+-3.20.3/gtk/deprecated/gtkrc.c	2016-08-21 22:40:48.168437905 +0200
+++ gtk+-3.20.3/gtk/deprecated/gtkrc.c	2016-08-23 10:12:09.097070097 +0200
@@ -768,7 +768,7 @@
 gchar *
 gtk_rc_get_im_module_file (void)
 {
-  const gchar *var = g_getenv ("GTK_IM_MODULE_FILE");
+  const gchar *var = g_getenv ("GUIX_GTK3_IM_MODULE_FILE");
   gchar *result = NULL;
 
   if (var)
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<tr><td><span title='2022-03-01 13:18:01 -0500'>2022-03-01</span></td><td><a href='/guix/commit/CODE-OF-CONDUCT?id=c67912011154e2b347cdf6f3e633e87fd44f409c'>CODE-OF-CONDUCT: Add a top notice.</a><span class='msg-avail'>...<span class='msg-tooltip'>* CODE-OF-CONDUCT: Add a top notice.
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<tr><td><span title='2022-03-01 13:07:04 -0500'>2022-03-01</span></td><td><a href='/guix/commit/CODE-OF-CONDUCT?id=4254d74b4ca6d4aa78b7fa055fc9ec72a2e93ad3'>CODE-OF-CONDUCT: Update to version 2.1.</a><span class='msg-avail'>...<span class='msg-tooltip'>* CODE-OF-CONDUCT: Update to version 2.1.
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