diff --git a/Makefile b/Makefile
index a7cf340..0138951 100644
--- a/Makefile
+++ b/Makefile
@@ -1,3 +1,5 @@
+SHELL = umask 002; exec /bin/sh
+
 FILES = events.ics events.atom news.atom index.html \
 	favicon.ico default.css robots.txt csclub.der csclub.pem
 SUBDIRS = about events office news services media buttons logos flash