diff --git a/meta-phosphor/classes/phosphor-software-manager-mmc.bbclass b/meta-phosphor/classes/phosphor-software-manager-mmc.bbclass
index 479619c..0590a83 100644
--- a/meta-phosphor/classes/phosphor-software-manager-mmc.bbclass
+++ b/meta-phosphor/classes/phosphor-software-manager-mmc.bbclass
@@ -2,9 +2,11 @@
 
 PACKAGECONFIG:append = " mmc_layout"
 
-EXTRA_OEMESON += "-Dactive-bmc-max-allowed=2"
-EXTRA_OEMESON += "-Dmedia-dir='/media'"
-EXTRA_OEMESON += "-Doptional-images='image-hostfw'"
+EXTRA_OEMESON:append = " \
+    -Dactive-bmc-max-allowed=2 \
+    -Dmedia-dir='/media' \
+    -Doptional-images='image-hostfw' \
+"
 
 RDEPENDS:phosphor-software-manager-updater-mmc += " \
     gptfdisk \
diff --git a/meta-phosphor/classes/phosphor-software-manager-ubi-fs.bbclass b/meta-phosphor/classes/phosphor-software-manager-ubi-fs.bbclass
index 71f8c6f..9d38ada 100644
--- a/meta-phosphor/classes/phosphor-software-manager-ubi-fs.bbclass
+++ b/meta-phosphor/classes/phosphor-software-manager-ubi-fs.bbclass
@@ -7,8 +7,10 @@
 "
 
 # Add ubi-fs configs
-EXTRA_OEMESON += "-Dactive-bmc-max-allowed=2"
-EXTRA_OEMESON += "-Dmedia-dir='/media'"
+EXTRA_OEMESON:append = " \
+    -Dactive-bmc-max-allowed=2 \
+    -Dmedia-dir='/media' \
+"
 
 SYSTEMD_SERVICE:phosphor-software-manager-updater-ubi += " \
     obmc-flash-bmc-ubirw.service \
diff --git a/meta-phosphor/recipes-core/systemd/systemd_%.bbappend b/meta-phosphor/recipes-core/systemd/systemd_%.bbappend
index 9d4dfc7..074dced 100644
--- a/meta-phosphor/recipes-core/systemd/systemd_%.bbappend
+++ b/meta-phosphor/recipes-core/systemd/systemd_%.bbappend
@@ -21,7 +21,7 @@
 FILESEXTRAPATHS:prepend := "${THISDIR}/${PN}:"
 SRC_URI += "file://0001-sd-bus-Don-t-automatically-add-ObjectManager.patch"
 
-EXTRA_OEMESON += "-Ddns-servers=''"
+EXTRA_OEMESON:append = " -Ddns-servers=''"
 
 ALTERNATIVE:${PN} += "init"
 ALTERNATIVE_TARGET[init] = "${rootlibexecdir}/systemd/systemd"
diff --git a/meta-phosphor/recipes-extended/sdbusplus/sdbusplus_git.bb b/meta-phosphor/recipes-extended/sdbusplus/sdbusplus_git.bb
index 208b4f3..b4b1019 100644
--- a/meta-phosphor/recipes-extended/sdbusplus/sdbusplus_git.bb
+++ b/meta-phosphor/recipes-extended/sdbusplus/sdbusplus_git.bb
@@ -18,7 +18,7 @@
         systemd \
         "
 
-EXTRA_OEMESON += " \
+EXTRA_OEMESON:append = " \
         -Dtests=disabled \
         -Dexamples=disabled \
         "
diff --git a/meta-phosphor/recipes-phosphor/flash/phosphor-software-manager_git.bb b/meta-phosphor/recipes-phosphor/flash/phosphor-software-manager_git.bb
index fbc6d4b..f51319a 100644
--- a/meta-phosphor/recipes-phosphor/flash/phosphor-software-manager_git.bb
+++ b/meta-phosphor/recipes-phosphor/flash/phosphor-software-manager_git.bb
@@ -84,7 +84,7 @@
 
 S = "${WORKDIR}/git"
 
-EXTRA_OEMESON += "-Dtests=disabled"
+EXTRA_OEMESON:append = " -Dtests=disabled"
 
 do_install:append() {
     install -d ${D}/usr/local
diff --git a/meta-phosphor/recipes-phosphor/gpio/phosphor-gpio-monitor_git.bb b/meta-phosphor/recipes-phosphor/gpio/phosphor-gpio-monitor_git.bb
index 1a8022c..a1ea913 100644
--- a/meta-phosphor/recipes-phosphor/gpio/phosphor-gpio-monitor_git.bb
+++ b/meta-phosphor/recipes-phosphor/gpio/phosphor-gpio-monitor_git.bb
@@ -47,4 +47,4 @@
 SRCREV = "b08a0f691740ef21e28547a57981b1043d46d8ce"
 S = "${WORKDIR}/git"
 
-EXTRA_OEMESON += "-Dtests=disabled"
+EXTRA_OEMESON:append = " -Dtests=disabled"
diff --git a/meta-phosphor/recipes-phosphor/host/phosphor-host-postd_git.bb b/meta-phosphor/recipes-phosphor/host/phosphor-host-postd_git.bb
index 7ff4b2c..e68960d 100644
--- a/meta-phosphor/recipes-phosphor/host/phosphor-host-postd_git.bb
+++ b/meta-phosphor/recipes-phosphor/host/phosphor-host-postd_git.bb
@@ -29,9 +29,11 @@
 SYSTEMD_PACKAGES = "${PN}"
 SYSTEMD_SERVICE:${PN} += "${SERVICE_FILE}"
 
-EXTRA_OEMESON += "-Dsnoop-device=${SNOOP_DEVICE}"
-EXTRA_OEMESON += "-Dpost-code-bytes=${POST_CODE_BYTES}"
-EXTRA_OEMESON += "-Dsystemd-target=multi-user.target"
+EXTRA_OEMESON:append = " \
+    -Dsnoop-device=${SNOOP_DEVICE} \
+    -Dpost-code-bytes=${POST_CODE_BYTES} \
+    -Dsystemd-target=multi-user.target \
+"
 
 POSTCODE_SEVENSEG_DEVICE ?= "seven_seg_disp_val"
 SERVICE_FILE_7SEG = " \
diff --git a/meta-phosphor/recipes-phosphor/ipmi/phosphor-ipmi-blobs_git.bb b/meta-phosphor/recipes-phosphor/ipmi/phosphor-ipmi-blobs_git.bb
index 70de28c..b989ef7 100644
--- a/meta-phosphor/recipes-phosphor/ipmi/phosphor-ipmi-blobs_git.bb
+++ b/meta-phosphor/recipes-phosphor/ipmi/phosphor-ipmi-blobs_git.bb
@@ -20,7 +20,7 @@
 
 FILES:${PN} += "${libdir}/ipmid-providers"
 
-EXTRA_OEMESON += " \
+EXTRA_OEMESON:append = " \
   -Dtests=disabled \
   -Dexamples=false \
   "
diff --git a/meta-phosphor/recipes-phosphor/leds/phosphor-led-manager_git.bb b/meta-phosphor/recipes-phosphor/leds/phosphor-led-manager_git.bb
index b834b6b..341c5f7 100644
--- a/meta-phosphor/recipes-phosphor/leds/phosphor-led-manager_git.bb
+++ b/meta-phosphor/recipes-phosphor/leds/phosphor-led-manager_git.bb
@@ -52,7 +52,7 @@
 # Install the override to set up a Conflicts relation
 SYSTEMD_OVERRIDE_${PN} += "bmc_booted.conf:obmc-led-group-start@bmc_booted.service.d/bmc_booted.conf"
 
-EXTRA_OEMESON += "-Dtests=disabled"
+EXTRA_OEMESON:append = " -Dtests=disabled"
 
 do_compile:prepend() {
     if [ -f "${LED_YAML_PATH}/led.yaml" ]; then
diff --git a/meta-phosphor/recipes-phosphor/leds/phosphor-led-sysfs_git.bb b/meta-phosphor/recipes-phosphor/leds/phosphor-led-sysfs_git.bb
index 684e41c..e1f7f25 100644
--- a/meta-phosphor/recipes-phosphor/leds/phosphor-led-sysfs_git.bb
+++ b/meta-phosphor/recipes-phosphor/leds/phosphor-led-sysfs_git.bb
@@ -16,7 +16,7 @@
 
 DBUS_SERVICE:${PN} += "xyz.openbmc_project.led.controller@.service"
 
-EXTRA_OEMESON += "-Dtests=disabled"
+EXTRA_OEMESON:append = " -Dtests=disabled"
 
 SRC_URI += "git://github.com/openbmc/phosphor-led-sysfs"
 SRC_URI += "file://70-leds.rules"
diff --git a/meta-phosphor/recipes-phosphor/logging/phosphor-hostlogger_git.bb b/meta-phosphor/recipes-phosphor/logging/phosphor-hostlogger_git.bb
index 5e81a0d..244f3ea 100644
--- a/meta-phosphor/recipes-phosphor/logging/phosphor-hostlogger_git.bb
+++ b/meta-phosphor/recipes-phosphor/logging/phosphor-hostlogger_git.bb
@@ -25,7 +25,7 @@
 SRCREV = "042b5ba8438d1423f807feb5ef739cda063ea8d2"
 
 # Disable unit tests
-EXTRA_OEMESON += "-Dtests=disabled"
+EXTRA_OEMESON:append = " -Dtests=disabled"
 
 # Systemd service template
 SYSTEMD_PACKAGES = "${PN}"
diff --git a/meta-phosphor/recipes-phosphor/network/phosphor-network_git.bb b/meta-phosphor/recipes-phosphor/network/phosphor-network_git.bb
index d1bdc0f..9a65858 100644
--- a/meta-phosphor/recipes-phosphor/network/phosphor-network_git.bb
+++ b/meta-phosphor/recipes-phosphor/network/phosphor-network_git.bb
@@ -37,4 +37,4 @@
 SYSTEMD_PACKAGES = "${PN}"
 SYSTEMD_SERVICE:${PN} += "xyz.openbmc_project.Network.service"
 
-EXTRA_OEMESON += "-Dtests=disabled"
+EXTRA_OEMESON:append = " -Dtests=disabled"
diff --git a/meta-phosphor/recipes-phosphor/sensors/phosphor-hwmon_git.bb b/meta-phosphor/recipes-phosphor/sensors/phosphor-hwmon_git.bb
index dbf5c96..68338c6 100644
--- a/meta-phosphor/recipes-phosphor/sensors/phosphor-hwmon_git.bb
+++ b/meta-phosphor/recipes-phosphor/sensors/phosphor-hwmon_git.bb
@@ -28,7 +28,7 @@
         cli11 \
         "
 
-EXTRA_OEMESON += "-Dtests=disabled"
+EXTRA_OEMESON:append = " -Dtests=disabled"
 
 FILES:${PN} += "${base_libdir}/systemd/system/xyz.openbmc_project.Hwmon@.service"
 RDEPENDS:${PN} += "\
diff --git a/meta-phosphor/recipes-phosphor/state/phosphor-state-manager_git.bb b/meta-phosphor/recipes-phosphor/state/phosphor-state-manager_git.bb
index 6b527c3..83939c4 100644
--- a/meta-phosphor/recipes-phosphor/state/phosphor-state-manager_git.bb
+++ b/meta-phosphor/recipes-phosphor/state/phosphor-state-manager_git.bb
@@ -57,7 +57,7 @@
 
 RDEPENDS:${PN}-chassis += "bash"
 
-EXTRA_OEMESON += "-Dtests=disabled"
+EXTRA_OEMESON:append = " -Dtests=disabled"
 
 FILES:${PN}-host = "${bindir}/phosphor-host-state-manager"
 DBUS_SERVICE:${PN}-host += "xyz.openbmc_project.State.Host.service"