--- a/debian/rules	2015-12-05 09:42:10.758251726 +0200
--- b/debian/rules	2015-12-05 09:51:58.484426475 +0200
@@ -1,6 +1,7 @@
 #!/usr/bin/make -f
 
 export JCROP_BUILD = debian/$(shell dpkg-parsechangelog --show-field Version)
+export JCROP_COPYRIGHT = $(shell date --date="$$(dpkg-parsechangelog --show-field Date)" +%Y)
 
 %:
 	dh $@