diff --git a/src/Dockerfile b/src/Dockerfile
index 932fee1..f3d4332 100644
--- a/src/Dockerfile
+++ b/src/Dockerfile
@@ -2,11 +2,7 @@ ARG PIHOLE_BASE
 FROM "${PIHOLE_BASE:-ghcr.io/pi-hole/docker-pi-hole-base:bullseye-slim}"
 
 ARG PIHOLE_DOCKER_TAG
-ENV PIHOLE_DOCKER_TAG "${PIHOLE_DOCKER_TAG}"
-
-ENV S6_OVERLAY_VERSION v3.1.1.2
-
-ENV PIHOLE_INSTALL /etc/.pihole/automated\ install/basic-install.sh
+RUN echo "${PIHOLE_DOCKER_TAG}" > /pihole.docker.tag
 
 ENTRYPOINT [ "/s6-init" ]
 
@@ -33,7 +29,6 @@ ENV S6_KEEP_ENV 1
 ENV S6_BEHAVIOUR_IF_STAGE2_FAILS 2
 ENV S6_CMD_WAIT_FOR_SERVICES_MAXTIME 0
 
-
 ENV FTLCONF_LOCAL_IPV4 0.0.0.0
 ENV FTL_CMD no-daemon
 ENV DNSMASQ_USER pihole
diff --git a/src/s6/debian-root/usr/local/bin/_startup.sh b/src/s6/debian-root/usr/local/bin/_startup.sh
index 2115461..a133b3c 100755
--- a/src/s6/debian-root/usr/local/bin/_startup.sh
+++ b/src/s6/debian-root/usr/local/bin/_startup.sh
@@ -9,7 +9,7 @@ fi
 . /usr/local/bin/bash_functions.sh
 
 # shellcheck source=/dev/null
-SKIP_INSTALL=true . "${PIHOLE_INSTALL}"
+SKIP_INSTALL=true . /etc/.pihole/automated\ install/basic-install.sh
 
 echo "  [i] Starting docker specific checks & setup for docker pihole/pihole"
 
diff --git a/src/s6/debian-root/usr/local/bin/install.sh b/src/s6/debian-root/usr/local/bin/install.sh
index f88a4ff..4407286 100644
--- a/src/s6/debian-root/usr/local/bin/install.sh
+++ b/src/s6/debian-root/usr/local/bin/install.sh
@@ -27,8 +27,9 @@ esac
 }
 
 
+DOCKER_TAG=$(cat /pihole.docker.tag)
 # Helps to have some additional tools in the dev image when debugging
-if [[ "${PIHOLE_DOCKER_TAG}" = 'nightly' ||  "${PIHOLE_DOCKER_TAG}" = 'dev' ]]; then
+if [[ "${DOCKER_TAG}" = 'nightly' ||  "${DOCKER_TAG}" = 'dev' ]]; then
   apt-get update
   apt-get install --no-install-recommends -y nano less
   rm -rf /var/lib/apt/lists/*
@@ -36,6 +37,8 @@ fi
 
 detect_arch
 
+S6_OVERLAY_VERSION=v3.1.1.2
+
 curl -L -s "https://github.com/just-containers/s6-overlay/releases/download/${S6_OVERLAY_VERSION}/s6-overlay-noarch.tar.xz" | tar Jxpf - -C /
 curl -L -s "https://github.com/just-containers/s6-overlay/releases/download/${S6_OVERLAY_VERSION}/s6-overlay-${S6_ARCH}.tar.xz" | tar Jxpf - -C /
 
@@ -66,7 +69,7 @@ export PIHOLE_SKIP_OS_CHECK=true
 curl -sSL https://install.pi-hole.net | bash -sex -- --unattended
 
 # At this stage, if we are building a :nightly tag, then switch the Pi-hole install to dev versions
-if [[ "${PIHOLE_DOCKER_TAG}" = 'nightly'  ]]; then
+if [[ "${DOCKER_TAG}" = 'nightly'  ]]; then
   yes | pihole checkout dev
 fi