File exmh-expectk.patch of Package exmh

--- lib/PgpDecryptExpect
+++ lib/PgpDecryptExpect
@@ -8,6 +8,9 @@
 #
 # Arguments: v, infile, outfile, exmh-bg name
 
+package require Tk
+package require expect
+
 wm withdraw .
 
 if {[llength $argv] < 4} {