--- sudoers.orig	2008-01-15 22:18:17.000000000 +0000
+++ sudoers	2008-10-11 20:36:46.928244000 +0000
@@ -14,6 +14,13 @@
 # Cmnd alias specification
 
 # Defaults specification
+# Uncomment if needed to preserve environmental variables related to the
+# FreeBSD pkg_* utilities and fetch.
+#Defaults	env_keep += "PKG_PATH PKG_DBDIR PKG_TMPDIR TMPDIR PACKAGEROOT PACKAGESITE PKGDIR FTP_PASSIVE_MODE"
+
+# Additionally uncomment if needed to preserve environmental variables
+# related to portupgrade.
+#Defaults	env_keep += "PORTSDIR PORTS_INDEX PORTS_DBDIR PACKAGES PKGTOOLS_CONF"
 
 # Runas alias specification