diff --git a/appendix b/appendix
index 51287a6..2db1013 100644
--- a/appendix
+++ b/appendix
@@ -48,29 +48,17 @@ ENV NB_USER=${NB_USER}
 
 ## ONBUILD section. These commands are run in child Dockerfiles. These are run right after the FROM image is loaded
 
+ONBUILD RUN echo "py-rocket-base: looking for configuration files to use"
+
 ONBUILD USER ${NB_USER}
 
 # ${REPO_DIR} is owned by ${NB_USER}
 ONBUILD COPY --chown=${NB_USER}:${NB_USER} . ${REPO_DIR}/childimage
 
-# repo2docker will load files from a .binder or binder directory if
-# present. We check if those directories exist.
-ONBUILD RUN echo "Checking for 'binder' or '.binder' subfolder" \
-        ; cd "${REPO_DIR}/childimage/" \
-        ; if [ -d binder ] ; then \
-        echo "Using 'binder/' build context" \
-        ; elif [ -d .binder ] ; then \
-        echo "Using '.binder/' build context" \
-        ; else \
-        echo "Using './' build context" \
-        ; fi
-
 # Copy Desktop files into ${REPO_DIR}/Desktop if they exist. start will copy to Application dir and Desktop
 # Will not fail if Desktop dir exists but is empty
 ONBUILD RUN echo "Checking for 'Desktop directory'..." \
         ; cd "${REPO_DIR}/childimage/" \
-        ; [ -d binder ] && cd binder \
-        ; [ -d .binder ] && cd .binder \
         ; if test -d Desktop ; then \
             mkdir -p "${REPO_DIR}/Desktop" && \
             [ "$(ls -A Desktop 2>/dev/null)" ] && cp -r Desktop/* "${REPO_DIR}/Desktop/"; \
@@ -81,8 +69,6 @@ ONBUILD RUN echo "Checking for 'Desktop directory'..." \
 ONBUILD USER root
 ONBUILD RUN echo "Checking for 'apt.txt'..." \
         ; cd "${REPO_DIR}/childimage/" \
-        ; [ -d binder ] && cd binder \
-        ; [ -d .binder ] && cd .binder \
         ; if test -f "apt.txt" ; then \
         package_list=$(grep -v '^\s*#' apt.txt | grep -v '^\s*$' | sed 's/\r//g; s/#.*//; s/^[[:space:]]*//; s/[[:space:]]*$//' | awk '{$1=$1};1') \
         && apt-get update --fix-missing > /dev/null \
@@ -97,8 +83,6 @@ ONBUILD USER ${NB_USER}
 # sometimes package solving will get rid of pip installed packages. Make sure jupyter-remote-desktop-proxy does not disappear
 ONBUILD RUN echo "Checking for 'conda-lock.yml' or 'environment.yml'..." \
         ; cd "${REPO_DIR}/childimage/" \
-        ; [ -d binder ] && cd binder \
-        ; [ -d .binder ] && cd .binder \
         ; if test -f "conda-lock.yml" ; then echo "Using conda-lock.yml" & \
         conda-lock install --name ${CONDA_ENV} \
         && pip install --no-deps jupyter-remote-desktop-proxy \
@@ -118,8 +102,6 @@ ONBUILD RUN echo "Checking for 'conda-lock.yml' or 'environment.yml'..." \
 # to avoid wasting space.
 ONBUILD RUN echo "Checking for pip 'requirements.txt'..." \
         ; cd "${REPO_DIR}/childimage/" \
-        ; [ -d binder ] && cd binder \
-        ; [ -d .binder ] && cd .binder \
         ; if test -f "requirements.txt" ; then \
         ${NB_PYTHON_PREFIX}/bin/pip install --no-cache -r requirements.txt \
         ; fi
@@ -127,8 +109,6 @@ ONBUILD RUN echo "Checking for pip 'requirements.txt'..." \
 # Add the r packages
 ONBUILD RUN echo "Checking for 'install.R" \
         ; cd "${REPO_DIR}/childimage/" \
-        ; [ -d binder ] && cd binder \
-        ; [ -d .binder ] && cd .binder \
         ; if test -f "install.R" ; then echo "Using install.R" & \
         Rscript install.R \
         ; fi
@@ -137,8 +117,6 @@ ONBUILD RUN echo "Checking for 'install.R" \
 # This is sourced in ${REPO_DIR}/start
 ONBUILD RUN echo "Checking for 'start'..." \
         ; cd "${REPO_DIR}/childimage/" \
-        ; [ -d binder ] && cd binder && cp start ${REPO_DIR}/childimage/start \
-        ; [ -d .binder ] && cd .binder && cp start ${REPO_DIR}/childimage/start \
         ; if test -f "start" ; then \
         chmod +x start \
         ; fi
@@ -149,8 +127,6 @@ ONBUILD RUN echo "Checking for 'start'..." \
 # leave behind.
 ONBUILD RUN echo "Checking for 'postBuild'..." \
         ; cd "${REPO_DIR}/childimage/" \
-        ; [ -d binder ] && cd binder \
-        ; [ -d .binder ] && cd .binder \
         ; if test -f "postBuild" ; then \
         chmod +x postBuild \
         && ./postBuild \