--- a/debian/patches/0001-reproducible-build.patch	1970-01-01 01:00:00.000000000 +0100
--- b/debian/patches/0001-reproducible-build.patch	2015-08-21 15:15:04.106535730 +0100
@@ -0,0 +1,11 @@
+--- libical-1.0.1.orig/scripts/mkderivedvalues.pl
++++ libical-1.0.1/scripts/mkderivedvalues.pl
+@@ -141,7 +141,7 @@ if($opt_c){
+   my $count = scalar(keys %h) + 1;
+   print "static const struct icalvalue_kind_map value_map[$count]={\n"; 
+ 
+-  foreach $value  (keys %h) {
++  foreach $value  (sort keys %h) {
+ 
+     next if $value eq 'NO' or $value eq 'ANY';
+ 
--- a/debian/patches/series	1970-01-01 01:00:00.000000000 +0100
--- b/debian/patches/series	2015-08-21 15:15:01.242512715 +0100
@@ -0,0 +1 @@
+0001-reproducible-build.patch