-#mod_perl v1
-#APACHE_VERSION = 1
-#mod_perl v2 prereleases up to and including 1.999_21
-#APACHE_VERSON = 1.99
-#mod_perl v2 proper and prereleases 1.999_22 and after
-APACHE_VERSION = 2
+#mod_perl v2 1.999_22 on Apache 2.0 through 2.3 (Debian ancient through 7.x)
+#APACHE_VERSION=2
+#Apache 2.4 (Debian 8.x)
+#APACHE_VERSION=2.4
+APACHE_VERSION := $(shell /usr/sbin/apache2 -v | grep -q '\/2\.4\.' && echo '2.4' || echo '2')
+
+#deb (-7 and upgrades)
+#FREESIDE_DOCUMENT_ROOT = /var/www/freeside
+#deb (new installs of 8+) (plus needs more work w/new auth)
+#FREESIDE_DOCUMENT_ROOT = /var/www/html/freeside
+FREESIDE_DOCUMENT_ROOT := $(shell [ ${APACHE_VERSION} = '2.4' ] && echo '/var/www/html/freeside' || echo '/var/www/freeside')