diff --git a/.github/workflows/docker-all.yml b/.github/workflows/docker-all.yml
new file mode 100644
index 0000000..99098df
--- /dev/null
+++ b/.github/workflows/docker-all.yml
@@ -0,0 +1,13 @@
+name: Trigger Build and Publish All Images
+
+on:
+  workflow_dispatch:
+
+jobs:
+  exit:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Print
+        run: |
+          echo "This is a way to start multiple workflows from manually activating one"
diff --git a/.github/workflows/docker-arch.yml b/.github/workflows/docker-arch.yml
new file mode 100644
index 0000000..43fa0cf
--- /dev/null
+++ b/.github/workflows/docker-arch.yml
@@ -0,0 +1,58 @@
+name: Arch Linux
+
+on:
+  workflow_dispatch:
+  workflow_run:
+    workflows: ["Trigger Build and Publish All Images"]
+    types:
+      - completed
+  push:
+    paths:
+      - arch/**
+
+jobs:
+  build-and-push-arch-image:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      packages: write
+
+    env:
+      IMAGE_NAME_WITH_TAG: ghcr.io/${{ github.repository_owner }}/root:latest-arch
+
+    steps:
+      - name: Print Image name with tag(s)
+        run: |
+          echo "Image name with tag: ${{ env.IMAGE_NAME_WITH_TAG }}"
+
+      - name: Checkout repository
+        uses: actions/checkout@v2
+
+      - name: Log in to the GitHub Container registry
+        uses: docker/login-action@v1
+        with:
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ secrets.GHCR_WRITE_TOKEN }}
+
+      - name: Build and Push Image
+        uses: docker/build-push-action@v2
+        with:
+          context: arch/
+          pull: true
+          push: false
+          tags: ${{ env.IMAGE_NAME_WITH_TAG }}
+          labels: |
+            org.opencontainers.image.source=https://github.com/${{ github.repository }}
+
+      - name: root version
+        run: |
+          export ROOT_VERSION=$(docker run ${{ env.IMAGE_NAME_WITH_TAG }} root-config --version | sed -r 's/\//./g')
+          echo "ROOT_VERSION=$ROOT_VERSION" >> $GITHUB_ENV
+          echo "ROOT_VERSION=$ROOT_VERSION"
+
+      - name: Add additional tag to image and push it
+        run: |
+          export IMAGE_NAME_WITH_NEW_TAG=ghcr.io/${{ github.repository_owner }}/root:${{ env.ROOT_VERSION }}-arch
+          docker tag ${{ env.IMAGE_NAME_WITH_TAG }} $IMAGE_NAME_WITH_NEW_TAG
+          docker push $IMAGE_NAME_WITH_NEW_TAG
diff --git a/.github/workflows/docker-centos.yml b/.github/workflows/docker-centos.yml
new file mode 100644
index 0000000..2502b13
--- /dev/null
+++ b/.github/workflows/docker-centos.yml
@@ -0,0 +1,61 @@
+name: CentOS 7
+
+on:
+  workflow_dispatch:
+  workflow_run:
+    workflows: ["Trigger Build and Publish All Images"]
+    types:
+      - completed
+  push:
+    paths:
+      - centos7/**
+
+jobs:
+  build-and-push-centos-image:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      packages: write
+
+    env:
+      IMAGE_NAME_WITH_TAG: ghcr.io/${{ github.repository_owner }}/root:latest-centos
+
+    steps:
+      - name: Print Image name with tag(s)
+        run: |
+          echo "Image name with tag: ${{ env.IMAGE_NAME_WITH_TAG }}"
+
+      - name: Checkout repository
+        uses: actions/checkout@v2
+
+      - name: Log in to the GitHub Container registry
+        uses: docker/login-action@v1
+        with:
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ secrets.GHCR_WRITE_TOKEN }}
+
+      - name: Build and Push Image
+        uses: docker/build-push-action@v2
+        with:
+          context: centos7/
+          pull: true
+          push: false
+          tags: ${{ env.IMAGE_NAME_WITH_TAG }}
+          labels: |
+            org.opencontainers.image.source=https://github.com/${{ github.repository }}
+
+      - name: root version and OS version
+        run: |
+          export ROOT_VERSION=$(docker run ${{ env.IMAGE_NAME_WITH_TAG }} root-config --version | sed -r 's/\//./g')
+          echo "ROOT_VERSION=$ROOT_VERSION" >> $GITHUB_ENV
+          echo "ROOT_VERSION=$ROOT_VERSION"
+          export OS_VERSION_ID=$(docker run ${{ env.IMAGE_NAME_WITH_TAG }} cat /etc/os-release | grep VERSION_ID | sed -r 's/VERSION_ID=//g' | sed -r 's/"//g')
+          echo "OS_VERSION_ID=$OS_VERSION_ID" >> $GITHUB_ENV
+          echo "OS_VERSION_ID=$OS_VERSION_ID"
+
+      - name: Add additional tag to image and push it
+        run: |
+          export IMAGE_NAME_WITH_NEW_TAG=ghcr.io/${{ github.repository_owner }}/root:${{ env.ROOT_VERSION }}-centos${{ env.OS_VERSION_ID }}
+          docker tag ${{ env.IMAGE_NAME_WITH_TAG }} $IMAGE_NAME_WITH_NEW_TAG
+          docker push $IMAGE_NAME_WITH_NEW_TAG
diff --git a/.github/workflows/docker-conda.yml b/.github/workflows/docker-conda.yml
new file mode 100644
index 0000000..87f856d
--- /dev/null
+++ b/.github/workflows/docker-conda.yml
@@ -0,0 +1,58 @@
+name: Conda
+
+on:
+  workflow_dispatch:
+  workflow_run:
+    workflows: ["Trigger Build and Publish All Images"]
+    types:
+      - completed
+  push:
+    paths:
+      - conda/**
+
+jobs:
+  build-and-push-conda-image:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      packages: write
+
+    env:
+      IMAGE_NAME_WITH_TAG: ghcr.io/${{ github.repository_owner }}/root:latest-conda
+
+    steps:
+      - name: Print Image name with tag(s)
+        run: |
+          echo "Image name with tag: ${{ env.IMAGE_NAME_WITH_TAG }}"
+
+      - name: Checkout repository
+        uses: actions/checkout@v2
+
+      - name: Log in to the GitHub Container registry
+        uses: docker/login-action@v1
+        with:
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ secrets.GHCR_WRITE_TOKEN }}
+
+      - name: Build and Push Image
+        uses: docker/build-push-action@v2
+        with:
+          context: conda/
+          pull: true
+          push: false
+          tags: ${{ env.IMAGE_NAME_WITH_TAG }}
+          labels: |
+            org.opencontainers.image.source=https://github.com/${{ github.repository }}
+
+      - name: root version
+        run: |
+          export ROOT_VERSION=$(docker run ${{ env.IMAGE_NAME_WITH_TAG }} root-config --version | sed -r 's/\//./g')
+          echo "ROOT_VERSION=$ROOT_VERSION" >> $GITHUB_ENV
+          echo "ROOT_VERSION=$ROOT_VERSION"
+
+      - name: Add additional tag to image and push it
+        run: |
+          export IMAGE_NAME_WITH_NEW_TAG=ghcr.io/${{ github.repository_owner }}/root:${{ env.ROOT_VERSION }}-conda
+          docker tag ${{ env.IMAGE_NAME_WITH_TAG }} $IMAGE_NAME_WITH_NEW_TAG
+          docker push $IMAGE_NAME_WITH_NEW_TAG
diff --git a/.github/workflows/docker-fedora.yml b/.github/workflows/docker-fedora.yml
new file mode 100644
index 0000000..0529f3c
--- /dev/null
+++ b/.github/workflows/docker-fedora.yml
@@ -0,0 +1,57 @@
+name: Fedora
+
+on:
+  workflow_dispatch:
+  workflow_run:
+    workflows: ["Trigger Build and Publish All Images"]
+    types:
+      - completed
+  push:
+    paths:
+      - fedora/**
+
+jobs:
+  build-and-push-fedora-image:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      packages: write
+
+    env:
+      IMAGE_NAME_WITH_TAG: ghcr.io/${{ github.repository_owner }}/root:latest-fedora
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v2
+
+      - name: Log in to the GitHub Container registry
+        uses: docker/login-action@v1
+        with:
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ secrets.GHCR_WRITE_TOKEN }}
+
+      - name: Build and Push Image
+        uses: docker/build-push-action@v2
+        with:
+          context: fedora/
+          pull: true
+          push: false
+          tags: ${{ env.IMAGE_NAME_WITH_TAG }}
+          labels: |
+            org.opencontainers.image.source=https://github.com/${{ github.repository }}
+
+      - name: root version and OS version
+        run: |
+          export ROOT_VERSION=$(docker run ${{ env.IMAGE_NAME_WITH_TAG }} root-config --version | sed -r 's/\//./g')
+          echo "ROOT_VERSION=$ROOT_VERSION" >> $GITHUB_ENV
+          echo "ROOT_VERSION=$ROOT_VERSION"
+          export OS_VERSION_ID=$(docker run ${{ env.IMAGE_NAME_WITH_TAG }} cat /etc/os-release | grep VERSION_ID | sed -r 's/VERSION_ID=//g' | sed -r 's/"//g')
+          echo "OS_VERSION_ID=$OS_VERSION_ID" >> $GITHUB_ENV
+          echo "OS_VERSION_ID=$OS_VERSION_ID"
+
+      - name: Add additional tag to image and push it
+        run: |
+          export IMAGE_NAME_WITH_NEW_TAG=ghcr.io/${{ github.repository_owner }}/root:${{ env.ROOT_VERSION }}-fedora${{ env.OS_VERSION_ID }}
+          docker tag ${{ env.IMAGE_NAME_WITH_TAG }} $IMAGE_NAME_WITH_NEW_TAG
+          docker push $IMAGE_NAME_WITH_NEW_TAG
diff --git a/.github/workflows/docker-gentoo.yml b/.github/workflows/docker-gentoo.yml
new file mode 100644
index 0000000..8293391
--- /dev/null
+++ b/.github/workflows/docker-gentoo.yml
@@ -0,0 +1,58 @@
+name: Gentoo
+
+on:
+  workflow_dispatch:
+  workflow_run:
+    workflows: ["Trigger Build and Publish All Images"]
+    types:
+      - completed
+  push:
+    paths:
+      - gentoo/**
+
+jobs:
+  build-and-push-gentoo-image:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      packages: write
+
+    env:
+      IMAGE_NAME_WITH_TAG: ghcr.io/${{ github.repository_owner }}/root:latest-gentoo
+
+    steps:
+      - name: Print Image name with tag(s)
+        run: |
+          echo "Image name with tag: ${{ env.IMAGE_NAME_WITH_TAG }}"
+
+      - name: Checkout repository
+        uses: actions/checkout@v2
+
+      - name: Log in to the GitHub Container registry
+        uses: docker/login-action@v1
+        with:
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ secrets.GHCR_WRITE_TOKEN }}
+
+      - name: Build and Push Image
+        uses: docker/build-push-action@v2
+        with:
+          context: gentoo/
+          pull: true
+          push: false
+          tags: ${{ env.IMAGE_NAME_WITH_TAG }}
+          labels: |
+            org.opencontainers.image.source=https://github.com/${{ github.repository }}
+
+      - name: root version
+        run: |
+          export ROOT_VERSION=$(docker run ${{ env.IMAGE_NAME_WITH_TAG }} root-config --version | sed -r 's/\//./g')
+          echo "ROOT_VERSION=$ROOT_VERSION" >> $GITHUB_ENV
+          echo "ROOT_VERSION=$ROOT_VERSION"
+
+      - name: Add additional tag to image and push it
+        run: |
+          export IMAGE_NAME_WITH_NEW_TAG=ghcr.io/${{ github.repository_owner }}/root:${{ env.ROOT_VERSION }}-gentoo
+          docker tag ${{ env.IMAGE_NAME_WITH_TAG }} $IMAGE_NAME_WITH_NEW_TAG
+          docker push $IMAGE_NAME_WITH_NEW_TAG
diff --git a/.github/workflows/docker-ubuntu-from-source.yml b/.github/workflows/docker-ubuntu-from-source.yml
new file mode 100644
index 0000000..e736e4d
--- /dev/null
+++ b/.github/workflows/docker-ubuntu-from-source.yml
@@ -0,0 +1,57 @@
+name: Ubuntu (from source)
+
+on:
+  workflow_dispatch:
+    inputs:
+      root-version-major:
+        required: true
+        description: ROOT Major version number (string) according to **Major.Minor.Patch** schema
+        default: "6"
+      root-version-minor:
+        required: true
+        description: ROOT Minor version number (string) according to **Major.Minor.Patch** schema
+        default: "26"
+      root-version-patch:
+        required: true
+        description: ROOT Patch version number (string) according to **Major.Minor.Patch** schema
+        default: "02"
+  push:
+    paths:
+      - ubuntu_from_source/**
+
+jobs:
+  build-and-push-ubuntu-image:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      packages: write
+
+    env:
+      ROOT_VERSION_STRING: ${{ github.event.inputs.root-version-major }}.${{ github.event.inputs.root-version-minor }}.${{ github.event.inputs.root-version-patch }}
+
+    steps:
+      - name: Print Image name with tag(s)
+        run: |
+          echo "Image name with tag: ${{ env.IMAGE_NAME_WITH_TAG }}"
+
+      - name: Checkout repository
+        uses: actions/checkout@v2
+
+      - name: Log in to the GitHub Container registry
+        uses: docker/login-action@v1
+        with:
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ secrets.GHCR_WRITE_TOKEN }}
+
+      - name: Build and Push Image
+        uses: docker/build-push-action@v2
+        with:
+          context: ubuntu_from_source/
+          pull: true
+          push: true
+          build-args: |
+            ROOT_VERSION=${{ env.ROOT_VERSION_STRING }}
+          tags: ghcr.io/${{ github.repository_owner }}/root:${{ env.ROOT_VERSION_STRING }}-ubuntu-from-source
+          labels: |
+            org.opencontainers.image.source=https://github.com/${{ github.repository }}
diff --git a/.github/workflows/docker-ubuntu.yml b/.github/workflows/docker-ubuntu.yml
new file mode 100644
index 0000000..d25bb52
--- /dev/null
+++ b/.github/workflows/docker-ubuntu.yml
@@ -0,0 +1,61 @@
+name: Ubuntu
+
+on:
+  workflow_dispatch:
+  workflow_run:
+    workflows: ["Trigger Build and Publish All Images"]
+    types:
+      - completed
+  push:
+    paths:
+      - ubuntu/**
+
+jobs:
+  build-and-push-ubuntu-image:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      packages: write
+
+    env:
+      IMAGE_NAME_WITH_TAG: ghcr.io/${{ github.repository_owner }}/root:latest-ubuntu
+
+    steps:
+      - name: Print Image name with tag(s)
+        run: |
+          echo "Image name with tag: ${{ env.IMAGE_NAME_WITH_TAG }}"
+
+      - name: Checkout repository
+        uses: actions/checkout@v2
+
+      - name: Log in to the GitHub Container registry
+        uses: docker/login-action@v1
+        with:
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ secrets.GHCR_WRITE_TOKEN }}
+
+      - name: Build and Push Image
+        uses: docker/build-push-action@v2
+        with:
+          context: ubuntu/
+          pull: true
+          push: false
+          tags: ${{ env.IMAGE_NAME_WITH_TAG }}
+          labels: |
+            org.opencontainers.image.source=https://github.com/${{ github.repository }}
+
+      - name: root version and OS version
+        run: |
+          export ROOT_VERSION=$(docker run ${{ env.IMAGE_NAME_WITH_TAG }} root-config --version | sed -r 's/\//./g')
+          echo "ROOT_VERSION=$ROOT_VERSION" >> $GITHUB_ENV
+          echo "ROOT_VERSION=$ROOT_VERSION"
+          export OS_VERSION_ID=$(docker run ${{ env.IMAGE_NAME_WITH_TAG }} cat /etc/os-release | grep VERSION_ID | sed -r 's/VERSION_ID=//g' | sed -r 's/"//g')
+          echo "OS_VERSION_ID=$OS_VERSION_ID" >> $GITHUB_ENV
+          echo "OS_VERSION_ID=$OS_VERSION_ID"
+
+      - name: Add additional tag to image and push it
+        run: |
+          export IMAGE_NAME_WITH_NEW_TAG=ghcr.io/${{ github.repository_owner }}/root:${{ env.ROOT_VERSION }}-ubuntu${{ env.OS_VERSION_ID }}
+          docker tag ${{ env.IMAGE_NAME_WITH_TAG }} $IMAGE_NAME_WITH_NEW_TAG
+          docker push $IMAGE_NAME_WITH_NEW_TAG
diff --git a/README.md b/README.md
index e882d69..10d03e6 100644
--- a/README.md
+++ b/README.md
@@ -6,8 +6,8 @@ Where to get help: [the ROOT forum](https://root-forum.cern.ch/)
 
 ## Supported tags and respective Dockerfile links
 
-* [`latest`](https://github.com/root-project/root-docker/blob/6.26.00-ubuntu20.04/ubuntu/Dockerfile) -> [`6.26.02-ubuntu20.04`](https://github.com/root-project/root-docker/blob/6.26.02-ubuntu20.04/ubuntu/Dockerfile), [`6.26.00-ubuntu20.04`](https://github.com/root-project/root-docker/blob/6.26.00-ubuntu20.04/ubuntu/Dockerfile), [`6.24.06-ubuntu20.04`](https://github.com/root-project/root-docker/blob/6.24.06-ubuntu20.04/ubuntu/Dockerfile), [`6.24.02-ubuntu20.04`](https://github.com/root-project/root-docker/blob/6.24.02-ubuntu20.04/ubuntu/Dockerfile), [`6.24.00-ubuntu20.04`](https://github.com/root-project/root-docker/blob/6.24.00-ubuntu20.04/ubuntu/Dockerfile), [`6.22.08-ubuntu20.04`](https://github.com/root-project/root-docker/blob/6.22.08-ubuntu20.04/ubuntu/Dockerfile), [`6.22.06-ubuntu20.04`](https://github.com/root-project/root-docker/blob/6.22.06-ubuntu20.04/ubuntu/Dockerfile), [`6.22.02-ubuntu20.04`](https://github.com/root-project/root-docker/blob/6.22.02-ubuntu20.04/ubuntu/Dockerfile), [`6.22.00-ubuntu20.04`](https://github.com/root-project/root-docker/blob/6.22.00-ubuntu20.04/ubuntu/Dockerfile), [`6.20.08-ubuntu20.04`](https://github.com/root-project/root-docker/blob/6.20.08-ubuntu20.04/ubuntu/Dockerfile)
-* [`6.26.02-ubuntu22.04`](https://github.com/root-project/root-docker/blob/6.26.02-ubuntu22.04/ubuntu/Dockerfile)
+* [`latest`](https://github.com/root-project/root-docker/blob/6.26.02-ubuntu22.04/ubuntu/Dockerfile) -> [`6.26.02-ubuntu22.04`](https://github.com/root-project/root-docker/blob/6.26.02-ubuntu22.04/ubuntu/Dockerfile)
+* [`6.26.02-ubuntu20.04`](https://github.com/root-project/root-docker/blob/6.26.02-ubuntu20.04/ubuntu/Dockerfile), [`6.26.00-ubuntu20.04`](https://github.com/root-project/root-docker/blob/6.26.00-ubuntu20.04/ubuntu/Dockerfile), [`6.24.06-ubuntu20.04`](https://github.com/root-project/root-docker/blob/6.24.06-ubuntu20.04/ubuntu/Dockerfile), [`6.24.02-ubuntu20.04`](https://github.com/root-project/root-docker/blob/6.24.02-ubuntu20.04/ubuntu/Dockerfile), [`6.24.00-ubuntu20.04`](https://github.com/root-project/root-docker/blob/6.24.00-ubuntu20.04/ubuntu/Dockerfile), [`6.22.08-ubuntu20.04`](https://github.com/root-project/root-docker/blob/6.22.08-ubuntu20.04/ubuntu/Dockerfile), [`6.22.06-ubuntu20.04`](https://github.com/root-project/root-docker/blob/6.22.06-ubuntu20.04/ubuntu/Dockerfile), [`6.22.02-ubuntu20.04`](https://github.com/root-project/root-docker/blob/6.22.02-ubuntu20.04/ubuntu/Dockerfile), [`6.22.00-ubuntu20.04`](https://github.com/root-project/root-docker/blob/6.22.00-ubuntu20.04/ubuntu/Dockerfile), [`6.20.08-ubuntu20.04`](https://github.com/root-project/root-docker/blob/6.20.08-ubuntu20.04/ubuntu/Dockerfile)
 * [`6.26.00-conda`](https://github.com/root-project/root-docker/blob/6.26.00-conda/conda/Dockerfile), [`6.24.06-conda`](https://github.com/root-project/root-docker/blob/6.24.06-conda/conda/Dockerfile), [`6.24.02-conda`](https://github.com/root-project/root-docker/blob/6.24.02-conda/conda/Dockerfile), [`6.24.00-conda`](https://github.com/root-project/root-docker/blob/6.24.00-conda-3/conda/Dockerfile), [`6.22.08-conda`](https://github.com/root-project/root-docker/blob/6.22.08-conda/conda/Dockerfile), [`6.22.06-conda`](https://github.com/root-project/root-docker/blob/6.22.06-conda/conda/Dockerfile), [`6.22.02-conda`](https://github.com/root-project/root-docker/blob/6.22.02-conda/conda/Dockerfile), [`6.22.00-conda`](https://github.com/root-project/root-docker/blob/6.22.00-conda/conda/Dockerfile)
 * [`6.26.00-arch`](https://github.com/root-project/root-docker/blob/6.26.00-arch/arch/Dockerfile), [`6.24.06-arch`](https://github.com/root-project/root-docker/blob/6.24.06-arch/arch/Dockerfile), [`6.24.02-arch`](https://github.com/root-project/root-docker/blob/6.24.02-arch/arch/Dockerfile), [`6.24.00-arch`](https://github.com/root-project/root-docker/blob/6.24.00-arch/arch/Dockerfile), [`6.22.06-arch`](https://github.com/root-project/root-docker/blob/6.22.06-arch/arch/Dockerfile), [`6.22.02-arch`](https://github.com/root-project/root-docker/blob/6.22.02-arch/arch/Dockerfile), [`6.22.00-arch`](https://github.com/root-project/root-docker/blob/6.22.00-arch/conda/Dockerfile), [`6.20.06-arch`](https://github.com/root-project/root-docker/blob/6.20.06-arch/arch/Dockerfile)
 * [`6.24.06-fedora35`](https://github.com/root-project/root-docker/blob/6.24.06-fedora35/fedora/Dockerfile)
@@ -18,15 +18,14 @@ Where to get help: [the ROOT forum](https://root-forum.cern.ch/)
 
 ### Supported C++ standards
 
-Different images provide different compilers and a ROOT installation built with different C++ standards.
+It is important to compile ROOT applications with the same C++ standard as ROOT itself was compiled with.
+Different images provide ROOT installations built with different C++ standards. Here is a breakdown by tag:
 
-The `latest` tag and the `*-ubuntu20.04` tags (starting from ROOT 6.24) have C++14 support: their ROOT is compiled with that C++ standard.
-
-Tags `*-arch`, `*-conda` and `*-fedora34` have C++17 support.
-
-Tags `*-fedora3[2,3]` have C++14 support.
-
-Tags `*-ubuntu20.04` (up to ROOT 6.22) and `*-centos7` come with ROOT compiled with C++11 support.
+- `latest`, `ubuntu22.04`: C++17 support
+- `ubuntu22.04` (starting from ROOT 6.24): C+14
+- `arch`, `conda`, `fedora34`, `fedora35`: C++17
+- `fedora32`, `fedora33`: C++14
+- `ubuntu20.04` (up to ROOT 6.22), `centos7`: C++11
 
 ## Getting started
 
@@ -84,3 +83,9 @@ docker run --rm -it -e DISPLAY=10.0.75.1:0 rootproject/root
 
 ## Examples
 [See GitHub for example Dockerfiles.](https://github.com/root-project/docker-examples)
+
+## Reproducibility of these images
+
+Even though for each image we link to the Dockerfile that produced it, in several cases running that same exact Dockerfile will _not_ result in an image identical to the one we offer. Sometimes it will even result in an image with a more recent ROOT version: this is the case for images based on rolling Linux distributions such as Arch, for example.
+
+The `*_from_source` recipes, on the other hand, are expected to be fully reproducible.
\ No newline at end of file