diff --git a/all-spark-notebook/hooks/run_hook b/all-spark-notebook/hooks/run_hook
index cbfc0d6a..8073d1e1 100755
--- a/all-spark-notebook/hooks/run_hook
+++ b/all-spark-notebook/hooks/run_hook
@@ -1,9 +1,7 @@
 #!/bin/bash
 set -e
 
-# Apply tags
 GIT_SHA_TAG=${GITHUB_SHA:0:12}
-docker tag $IMAGE_NAME "$DOCKER_REPO:$GIT_SHA_TAG"
 
 # Update index
 INDEX_ROW="|\`${BUILD_TIMESTAMP}\`|\`jupyter/${IMAGE_SHORT_NAME}:${GIT_SHA_TAG}\`|[Git diff](https://github.com/jupyter/docker-stacks/commit/${GITHUB_SHA})<br />[Dockerfile](https://github.com/jupyter/docker-stacks/blob/${GITHUB_SHA}/${IMAGE_SHORT_NAME}/Dockerfile)<br />[Build manifest](./${IMAGE_SHORT_NAME}-${GIT_SHA_TAG})|"
diff --git a/base-notebook/hooks/run_hook b/base-notebook/hooks/run_hook
index df571821..0e337694 100755
--- a/base-notebook/hooks/run_hook
+++ b/base-notebook/hooks/run_hook
@@ -1,17 +1,11 @@
 #!/bin/bash
 set -e
 
-# Apply tags
 GIT_SHA_TAG=${GITHUB_SHA:0:12}
-docker tag $IMAGE_NAME "$DOCKER_REPO:$GIT_SHA_TAG"
 PY_VERSION_TAG="python-$(docker run --rm ${IMAGE_NAME} python --version 2>&1 | awk '{print $2}')"
-docker tag $IMAGE_NAME "$DOCKER_REPO:$PY_VERSION_TAG"
 NB_VERSION_TAG="notebook-$(docker run --rm -a STDOUT ${IMAGE_NAME} jupyter-notebook --version | tr -d '\r')"
-docker tag $IMAGE_NAME "$DOCKER_REPO:${NB_VERSION_TAG%% }"
 LAB_VERSION_TAG="lab-$(docker run --rm -a STDOUT ${IMAGE_NAME} jupyter-lab --version | tr -d '\r')"
-docker tag $IMAGE_NAME "$DOCKER_REPO:${LAB_VERSION_TAG%%\r}"
 HUB_VERSION_TAG="hub-$(docker run --rm -a STDOUT ${IMAGE_NAME} jupyterhub --version | tr -d '\r')"
-docker tag $IMAGE_NAME "$DOCKER_REPO:${HUB_VERSION_TAG%%\r}"
 
 # Update index
 INDEX_FILE="${WIKI_PATH}/Home.md"
diff --git a/datascience-notebook/Dockerfile b/datascience-notebook/Dockerfile
index 3daa993d..2c34020b 100644
--- a/datascience-notebook/Dockerfile
+++ b/datascience-notebook/Dockerfile
@@ -62,10 +62,10 @@ RUN conda install --quiet --yes \
     'r-caret=6.0*' \
     'r-crayon=1.4*' \
     'r-devtools=2.3*' \
-    'r-forecast=8.14*' \ 
+    'r-forecast=8.14*' \
     'r-hexbin=1.28*' \
     'r-htmltools=0.5*' \
-    'r-htmlwidgets=1.5*' \ 
+    'r-htmlwidgets=1.5*' \
     'r-irkernel=1.1*' \
     'r-nycflights13=1.0*' \
     'r-randomforest=4.6*' \
diff --git a/datascience-notebook/hooks/run_hook b/datascience-notebook/hooks/run_hook
index 9a68d7d5..f0c53f93 100755
--- a/datascience-notebook/hooks/run_hook
+++ b/datascience-notebook/hooks/run_hook
@@ -1,21 +1,13 @@
 #!/bin/bash
 set -e
 
-# Apply tags
 GIT_SHA_TAG=${GITHUB_SHA:0:12}
-docker tag $IMAGE_NAME "$DOCKER_REPO:$GIT_SHA_TAG"
 PY_VERSION_TAG="python-$(docker run --rm ${IMAGE_NAME} python --version 2>&1 | awk '{print $2}')"
-docker tag $IMAGE_NAME "$DOCKER_REPO:$PY_VERSION_TAG"
 R_VERSION_TAG="r-$(docker run --rm -a STDOUT ${IMAGE_NAME} R --version | sed -n 1p | awk '{print $3}')"
-docker tag $IMAGE_NAME "$DOCKER_REPO:${R_VERSION_TAG%%\r}"
 JULIA_VERSION_TAG="julia-$(docker run --rm -a STDOUT ${IMAGE_NAME} julia --version | awk '{print $3}')"
-docker tag $IMAGE_NAME "$DOCKER_REPO:${JULIA_VERSION_TAG%%\r}"
 NB_VERSION_TAG="notebook-$(docker run --rm -a STDOUT ${IMAGE_NAME} jupyter-notebook --version | tr -d '\r')"
-docker tag $IMAGE_NAME "$DOCKER_REPO:${NB_VERSION_TAG%% }"
 LAB_VERSION_TAG="lab-$(docker run --rm -a STDOUT ${IMAGE_NAME} jupyter-lab --version | tr -d '\r')"
-docker tag $IMAGE_NAME "$DOCKER_REPO:${LAB_VERSION_TAG%%\r}"
 HUB_VERSION_TAG="hub-$(docker run --rm -a STDOUT ${IMAGE_NAME} jupyterhub --version | tr -d '\r')"
-docker tag $IMAGE_NAME "$DOCKER_REPO:${HUB_VERSION_TAG%%\r}"
 
 
 # Update index
diff --git a/minimal-notebook/hooks/run_hook b/minimal-notebook/hooks/run_hook
index 69c21756..f4407c15 100755
--- a/minimal-notebook/hooks/run_hook
+++ b/minimal-notebook/hooks/run_hook
@@ -1,9 +1,7 @@
 #!/bin/bash
 set -e
 
-# Apply tags
 GIT_SHA_TAG=${GITHUB_SHA:0:12}
-docker tag $IMAGE_NAME "$DOCKER_REPO:$GIT_SHA_TAG"
 
 # Update index
 INDEX_ROW="|\`${BUILD_TIMESTAMP}\`|\`jupyter/${IMAGE_SHORT_NAME}:${GIT_SHA_TAG}\`|[Git diff](https://github.com/jupyter/docker-stacks/commit/${GITHUB_SHA})<br />[Dockerfile](https://github.com/jupyter/docker-stacks/blob/${GITHUB_SHA}/${IMAGE_SHORT_NAME}/Dockerfile)<br />[Build manifest](./${IMAGE_SHORT_NAME}-${GIT_SHA_TAG})|"
diff --git a/pyspark-notebook/hooks/run_hook b/pyspark-notebook/hooks/run_hook
index d4c65521..0fafbc09 100755
--- a/pyspark-notebook/hooks/run_hook
+++ b/pyspark-notebook/hooks/run_hook
@@ -1,9 +1,7 @@
 #!/bin/bash
 set -e
 
-# Apply tags
 GIT_SHA_TAG=${GITHUB_SHA:0:12}
-docker tag $IMAGE_NAME "$DOCKER_REPO:$GIT_SHA_TAG"
 
 # Update index
 INDEX_ROW="|\`${BUILD_TIMESTAMP}\`|\`jupyter/${IMAGE_SHORT_NAME}:${GIT_SHA_TAG}\`|[Git diff](https://github.com/jupyter/docker-stacks/commit/${GITHUB_SHA})<br />[Dockerfile](https://github.com/jupyter/docker-stacks/blob/${GITHUB_SHA}/${IMAGE_SHORT_NAME}/Dockerfile)<br />[Build manifest](./${IMAGE_SHORT_NAME}-${GIT_SHA_TAG})|"
diff --git a/r-notebook/hooks/run_hook b/r-notebook/hooks/run_hook
index 2add2162..6170d929 100755
--- a/r-notebook/hooks/run_hook
+++ b/r-notebook/hooks/run_hook
@@ -1,9 +1,7 @@
 #!/bin/bash
 set -e
 
-# Apply tags
 GIT_SHA_TAG=${GITHUB_SHA:0:12}
-docker tag $IMAGE_NAME "$DOCKER_REPO:$GIT_SHA_TAG"
 
 # Update index
 INDEX_ROW="|\`${BUILD_TIMESTAMP}\`|\`jupyter/${IMAGE_SHORT_NAME}:${GIT_SHA_TAG}\`|[Git diff](https://github.com/jupyter/docker-stacks/commit/${GITHUB_SHA})<br />[Dockerfile](https://github.com/jupyter/docker-stacks/blob/${GITHUB_SHA}/${IMAGE_SHORT_NAME}/Dockerfile)<br />[Build manifest](./${IMAGE_SHORT_NAME}-${GIT_SHA_TAG})|"
diff --git a/scipy-notebook/hooks/run_hook b/scipy-notebook/hooks/run_hook
index 783ffa92..f4407c15 100755
--- a/scipy-notebook/hooks/run_hook
+++ b/scipy-notebook/hooks/run_hook
@@ -1,9 +1,7 @@
 #!/bin/bash
 set -e
 
-# Apply tags
 GIT_SHA_TAG=${GITHUB_SHA:0:12}
-docker tag $IMAGE_NAME "$DOCKER_REPO:$GIT_SHA_TAG"
 
 # Update index
 INDEX_ROW="|\`${BUILD_TIMESTAMP}\`|\`jupyter/${IMAGE_SHORT_NAME}:${GIT_SHA_TAG}\`|[Git diff](https://github.com/jupyter/docker-stacks/commit/${GITHUB_SHA})<br />[Dockerfile](https://github.com/jupyter/docker-stacks/blob/${GITHUB_SHA}/${IMAGE_SHORT_NAME}/Dockerfile)<br />[Build manifest](./${IMAGE_SHORT_NAME}-${GIT_SHA_TAG})|"
@@ -42,4 +40,4 @@ $(docker run --rm ${IMAGE_NAME} conda list)
 \`\`\`
 $(docker run --rm ${IMAGE_NAME} apt list --installed)
 \`\`\`
-EOF
\ No newline at end of file
+EOF
diff --git a/tensorflow-notebook/hooks/run_hook b/tensorflow-notebook/hooks/run_hook
index 69c21756..f4407c15 100755
--- a/tensorflow-notebook/hooks/run_hook
+++ b/tensorflow-notebook/hooks/run_hook
@@ -1,9 +1,7 @@
 #!/bin/bash
 set -e
 
-# Apply tags
 GIT_SHA_TAG=${GITHUB_SHA:0:12}
-docker tag $IMAGE_NAME "$DOCKER_REPO:$GIT_SHA_TAG"
 
 # Update index
 INDEX_ROW="|\`${BUILD_TIMESTAMP}\`|\`jupyter/${IMAGE_SHORT_NAME}:${GIT_SHA_TAG}\`|[Git diff](https://github.com/jupyter/docker-stacks/commit/${GITHUB_SHA})<br />[Dockerfile](https://github.com/jupyter/docker-stacks/blob/${GITHUB_SHA}/${IMAGE_SHORT_NAME}/Dockerfile)<br />[Build manifest](./${IMAGE_SHORT_NAME}-${GIT_SHA_TAG})|"