diff --git a/bootstrap.d/11-apt.sh b/bootstrap.d/11-apt.sh
index 0f03744..f413f58 100644
--- a/bootstrap.d/11-apt.sh
+++ b/bootstrap.d/11-apt.sh
@@ -12,7 +12,7 @@ if [ -z "$APT_PROXY" ] ; then
 fi
 
 if [ "$BUILD_KERNEL" = false ] ; then
-  if [ RPI_MODEL = 2 ] ; then
+  if [ "$RPI_MODEL" = 2 ] ; then
   # Install APT pinning configuration for flash-kernel package
   install_readonly files/apt/flash-kernel "${ETC_DIR}/apt/preferences.d/flash-kernel"
 
@@ -25,6 +25,7 @@ if [ "$BUILD_KERNEL" = false ] ; then
   chroot_exec apt-get -qq -y --allow-unauthenticated install collabora-obs-archive-keyring
   # if RPI_MODEL = [0] || [1] || [1P]
   else
+  echo "error: ATM there is just a precompiled kernel for model 2";
   # insert apt configuration for precompiled kernel repository for RPI 0,1,1P
   fi
   
diff --git a/rpi23-gen-image.sh b/rpi23-gen-image.sh
index 3fb9b8f..2931ab8 100755
--- a/rpi23-gen-image.sh
+++ b/rpi23-gen-image.sh
@@ -153,7 +153,7 @@ ENABLE_IFNAMES=${ENABLE_IFNAMES:=true}
 DISABLE_UNDERVOLT_WARNINGS=${DISABLE_UNDERVOLT_WARNINGS:=}
 
 # Kernel compilation settings
-BUILD_KERNEL=${BUILD_KERNEL:=false}
+BUILD_KERNEL=${BUILD_KERNEL:=true}
 KERNEL_REDUCE=${KERNEL_REDUCE:=false}
 KERNEL_THREADS=${KERNEL_THREADS:=1}
 KERNEL_HEADERS=${KERNEL_HEADERS:=true}
@@ -510,6 +510,7 @@ if [ "$ENABLE_REDUCE" = true ] ; then
   fi
 fi
 
+#backwards compability to jessie - untested
 if [ "$RELEASE" != "jessie" ] ; then
   APT_INCLUDES="${APT_INCLUDES},libnss-systemd"
 fi