diff --git a/meta-zaius/recipes-phosphor/sensors/phosphor-hwmon%.bbappend b/meta-zaius/recipes-phosphor/sensors/phosphor-hwmon%.bbappend
index 1aaa631..f7e8cd5 100644
--- a/meta-zaius/recipes-phosphor/sensors/phosphor-hwmon%.bbappend
+++ b/meta-zaius/recipes-phosphor/sensors/phosphor-hwmon%.bbappend
@@ -1,4 +1,4 @@
-FILESEXTRAPATHS_prepend := "${THISDIR}/${PN}:"
+FILESEXTRAPATHS_prepend_zaius := "${THISDIR}/${PN}:"
 
 ZAIUS_CHIPS = "i2c@1e78a000/i2c-bus@40/ucd90160@64"
 ZAIUS_ITEMSFMT = "ahb/apb/{0}.conf"
@@ -13,5 +13,6 @@
 ZAIUS_OCCITEMS = "${@compose_list(d, 'ZAIUS_OCCSFMT', 'ZAIUS_OCCS')}"
 
 ENVS = "obmc/hwmon/{0}"
-SYSTEMD_ENVIRONMENT_FILE_${PN} += "${@compose_list(d, 'ENVS', 'ZAIUS_ITEMS')}"
-SYSTEMD_ENVIRONMENT_FILE_${PN} += "${@compose_list(d, 'ENVS', 'ZAIUS_OCCITEMS')}"
+# compose_list is not defined immediately so don't use :=
+SYSTEMD_ENVIRONMENT_FILE_${PN}_append_zaius = " ${@compose_list(d, 'ENVS', 'ZAIUS_ITEMS')}"
+SYSTEMD_ENVIRONMENT_FILE_${PN}_append_zaius = " ${@compose_list(d, 'ENVS', 'ZAIUS_OCCITEMS')}"