diff --git a/packages/kernels/linux-tegra/nvbuild.sh b/packages/kernels/linux-tegra/nvbuild.sh
index f41dd0112..42b190a43 100644
--- a/packages/kernels/linux-tegra/nvbuild.sh
+++ b/packages/kernels/linux-tegra/nvbuild.sh
@@ -37,7 +37,7 @@ set -e
 SCRIPT_DIR="$(dirname $(readlink -f "${0}"))"
 SCRIPT_NAME="$(basename "${0}")"
 
-source "${SCRIPT_DIR}/nvcommon_build.sh"
+. "${SCRIPT_DIR}/nvcommon_build.sh"
 
 function usage {
         cat <<EOM
diff --git a/packages/static/kairos-overlay-files/files/system/oem/00_rootfs.yaml b/packages/static/kairos-overlay-files/files/system/oem/00_rootfs.yaml
index e9f2b1725..13d40e3df 100644
--- a/packages/static/kairos-overlay-files/files/system/oem/00_rootfs.yaml
+++ b/packages/static/kairos-overlay-files/files/system/oem/00_rootfs.yaml
@@ -96,8 +96,8 @@ stages:
       name: "add custom bind and ephemeral mounts to /run/cos/cos-layout.env"
       commands:
         - |
-          source /run/cos/cos-layout.env
-          source /run/cos/custom-layout.env
+          . /run/cos/cos-layout.env
+          . /run/cos/custom-layout.env
           PERSISTENT_STATE_PATHS="${PERSISTENT_STATE_PATHS} ${CUSTOM_BIND_MOUNTS} "
           RW_PATHS="${RW_PATHS} ${CUSTOM_EPHEMERAL_MOUNTS}"
           # Remove the existing lines that we are gonna rewrite
diff --git a/packages/static/kairos-overlay-files/files/system/oem/09_openrc_services.yaml b/packages/static/kairos-overlay-files/files/system/oem/09_openrc_services.yaml
index 3a5784295..37532c7cb 100644
--- a/packages/static/kairos-overlay-files/files/system/oem/09_openrc_services.yaml
+++ b/packages/static/kairos-overlay-files/files/system/oem/09_openrc_services.yaml
@@ -54,7 +54,7 @@ stages:
           pidfile="/run/cos-setup-reconcile.pid"
           respawn_delay=360
           set -o allexport
-          if [ -f /etc/environment ]; then source /etc/environment; fi
+          if [ -f /etc/environment ]; then . /etc/environment; fi
           set +o allexport
       - path: /etc/init.d/kairos-agent
         content: |
@@ -94,7 +94,7 @@ stages:
           pidfile="/run/${RC_SVCNAME}.pid"
           respawn_delay=5
           set -o allexport
-          if [ -f /etc/environment ]; then source /etc/environment; fi
+          if [ -f /etc/environment ]; then . /etc/environment; fi
           set +o allexport
         permissions: 0755
         owner: 0
diff --git a/packages/static/kairos-overlay-files/files/system/oem/50_recovery.yaml b/packages/static/kairos-overlay-files/files/system/oem/50_recovery.yaml
index 0c08f3a35..f1884a271 100644
--- a/packages/static/kairos-overlay-files/files/system/oem/50_recovery.yaml
+++ b/packages/static/kairos-overlay-files/files/system/oem/50_recovery.yaml
@@ -21,7 +21,7 @@ stages:
       hostname: "cos-recovery"
       commands:
         - |
-          source /etc/os-release
+          . /etc/os-release
           echo >> /etc/issue
           echo "You are booting from recovery mode. Run 'kairos-agent reset' to reset the system to $VERSION" >> /etc/issue
           echo " or 'kairos-agent upgrade' to upgrade the active partition" >> /etc/issue