diff --git a/.github/workflows/build-docker.yml b/.github/workflows/build-docker.yml
index 81211e4dedb..2e14db5d9f1 100644
--- a/.github/workflows/build-docker.yml
+++ b/.github/workflows/build-docker.yml
@@ -108,22 +108,27 @@ jobs:
         run: |
           branch_label_1=${{ github.base_ref }}
           branch_label_2=$(echo ${{ github.ref }} | cut -d'/' -f3)
-          echo "branch_label=${branch_label_1:-$branch_label_2}" >> $GITHUB_OUTPUT
+          branch_label=${branch_label_1:-$branch_label_2}
+          echo "branch_label=$branch_label" >> $GITHUB_OUTPUT
           vcpkg_sha_short=$(git rev-parse --short=8 HEAD)
           echo "vcpkg_sha_short=$vcpkg_sha_short" >> $GITHUB_OUTPUT
-          docker_build_label=hpccsystems/platform-build-base-${{ inputs.os }}
+          docker_build_label=hpccsystems/platform-build-${{ inputs.os }}
           echo "docker_tag=$docker_build_label:$vcpkg_sha_short" >> $GITHUB_OUTPUT
+          echo "docker_tag_candidate_base=$docker_build_label:$branch_label" >> $GITHUB_OUTPUT
 
       - name: Print vars
         shell: "bash"
         run: |
           echo "${{ toJSON(steps.vars.outputs) }}"
 
-      - uses: docker/setup-buildx-action@v2
+      - name: Set up Docker Buildx
+        id: buildx
+        uses: docker/setup-buildx-action@v3
 
       - name: Pull Build Image
         run: |
           docker pull ${{ steps.vars.outputs.docker_tag }} || true
+          docker pull ${{ steps.vars.outputs.docker_tag_candidate_base }} || true
 
       - uses: hendrikmuhs/ccache-action@v1.2
         with:
@@ -135,6 +140,23 @@ jobs:
             docker-${{ inputs.os }}-${{ inputs.build-type }}-
             docker-${{ inputs.os }}-
 
+      - name: Docker build image
+        uses: docker/build-push-action@v5
+        with:
+          builder: ${{ steps.buildx.outputs.name }}
+          file: HPCC-Platform/dockerfiles/vcpkg/${{ inputs.os }}.dockerfile
+          context: HPCC-Platform/dockerfiles/vcpkg/.
+          push: false
+          load: true
+          build-args: |
+            VCPKG_REF=${{ steps.vars.outputs.vcpkg_sha_short }}
+          tags: |
+            ${{ steps.vars.outputs.docker_tag }}
+            ${{ steps.vars.outputs.docker_tag_candidate_base }}
+          cache-from: |
+            type=registry,ref=${{ steps.vars.outputs.docker_tag }}
+            type=registry,ref=${{ steps.vars.outputs.docker_tag_candidate_base }}
+
       - name: CMake Configure and Build
         shell: "bash"
         run: |
diff --git a/dockerfiles/vcpkg/build.sh b/dockerfiles/vcpkg/build.sh
index d4247e37f15..c608aab9a0c 100755
--- a/dockerfiles/vcpkg/build.sh
+++ b/dockerfiles/vcpkg/build.sh
@@ -50,7 +50,7 @@ function doBuild() {
 
     rm -f ./vcpkg/vcpkg 
     mkdir -p ./build-$1
-    if [ "$1" == "centos-7*" ]; then
+    if [ "$1" == "centos-7" ] || [ "$1" == "centos-7-rh-python38" ]; then
         CMAKE_OPTIONS_EXTRA="-DVCPKG_TARGET_TRIPLET=x64-centos-7-dynamic -DCMAKE_C_COMPILER_LAUNCHER=ccache -DCMAKE_CXX_COMPILER_LAUNCHER=ccache"
     elif [ "$1" == "amazonlinux" ]; then
         CMAKE_OPTIONS_EXTRA="-DVCPKG_TARGET_TRIPLET=x64-amazonlinux-dynamic -DCMAKE_C_COMPILER_LAUNCHER=ccache -DCMAKE_CXX_COMPILER_LAUNCHER=ccache"
diff --git a/dockerfiles/vcpkg/centos-7-rh-python38.dockerfile b/dockerfiles/vcpkg/centos-7-rh-python38.dockerfile
index 8752d764d67..c59a9f5c2df 100644
--- a/dockerfiles/vcpkg/centos-7-rh-python38.dockerfile
+++ b/dockerfiles/vcpkg/centos-7-rh-python38.dockerfile
@@ -2,7 +2,7 @@ ARG VCPKG_REF=latest
 FROM hpccsystems/platform-build-base-centos-7:$VCPKG_REF
 
 RUN yum remove -y python3 python3-devel && \
-    yum install -y rh-python38 rh-python38-python-devel && \
+    yum install -y flex bison rh-python38 rh-python38-python-devel && \
     yum clean all
 
 RUN echo "source /opt/rh/rh-python38/enable" >> /etc/bashrc
diff --git a/dockerfiles/vcpkg/centos-7.dockerfile b/dockerfiles/vcpkg/centos-7.dockerfile
index 04d1ba29af5..1e6b580b874 100644
--- a/dockerfiles/vcpkg/centos-7.dockerfile
+++ b/dockerfiles/vcpkg/centos-7.dockerfile
@@ -1,6 +1,9 @@
 ARG VCPKG_REF=latest
 FROM hpccsystems/platform-build-base-centos-7:$VCPKG_REF
 
+RUN yum install -y flex bison && \
+    yum clean all 
+
 ENTRYPOINT ["/bin/bash", "--login", "-c"]
 
 CMD ["/bin/bash"]
diff --git a/vcpkg b/vcpkg
index ddf0c6df807..9cfc9a37c21 160000
--- a/vcpkg
+++ b/vcpkg
@@ -1 +1 @@
-Subproject commit ddf0c6df807a454c74f33d7ba75037314bf9a79c
+Subproject commit 9cfc9a37c21c7e0bf4c08aa5d491b0a6b1ba2de1