1 files changed, 2 insertions, 1 deletions
diff --git a/source.mk b/source.mk
index f28d7f6..bb26c3a 100644
--- a/source.mk
+++ b/source.mk
@@ -1,6 +1,7 @@
 upstream_ver = $$(printf '%s\n' '$(OPK_SOURCE_VERSION_UPSTREAM)' | \
 	sed 's/^\([0-9a-z.~-][0-9a-z.~-]*\)+sip[1-9][0-9]*.*$$/\1/')
-upstream_url = http://zlib.net/zlib-$(upstream_ver).tar.gz
+upstream_archive = zlib-$(upstream_ver).tar.gz
+upstream_url = http://zlib.net/$(upstream_archive)
 source_archive = ../zlib-$(OPK_SOURCE_VERSION_UPSTREAM).orig.tar.gz
 
 $(source_archive):