diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index ab18585..2a74b85 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -43,13 +43,6 @@ jobs:
       - name: Prepare directories
         run: bash ci/prepare-dirs.sh
 
-      - name: Cache installed dependencies
-        id: cache-deps
-        uses: actions/cache@v4
-        with:
-          path: ~/local
-          key: ${{ inputs.cache_key }}
-
       - name: Cache Arrow third-party downloads
         id: cache-arrow-thirdparty
         uses: actions/cache@v4
@@ -62,20 +55,17 @@ jobs:
         run: bash ci/free-disk-space.sh
 
       - name: Build and install Greenplum
-        if: steps.cache-deps.outputs.cache-hit != 'true'
         run: bash ci/build-gpdb.sh "${{ inputs.gpdb_repo }}" "${{ inputs.gpdb_ref }}" ${{ inputs.open_gpdb && 'open-gpdb' || '' }}
 
       - name: Build and install Arrow 15
-        if: steps.cache-deps.outputs.cache-hit != 'true'
         run: bash ci/build-arrow.sh
 
       - name: Build and install gRPC
-        if: steps.cache-deps.outputs.cache-hit != 'true'
         run: bash ci/build-grpc.sh
 
       - name: Verify open-gpdb defines OPENGPDB
         if: inputs.open_gpdb
-        run: bash ci/verify-opengpdb-define.sh
+        run: bash ci/verify-opengpdb-define.sh  
 
       - name: Build Tea
         run: bash ci/build-tea.sh
diff --git a/ci/build-gpdb.sh b/ci/build-gpdb.sh
index c64e8ad..9b99d91 100644
--- a/ci/build-gpdb.sh
+++ b/ci/build-gpdb.sh
@@ -1,52 +1,57 @@
 #!/usr/bin/env bash
-# Build and install Greenplum 6 into $HOME/local/gpdb.
-#
-# Usage: build-gpdb.sh <repo-url> <ref> [open-gpdb]
-#
-# Passing "open-gpdb" as the third argument enables the fixups needed for the
-# open-gpdb fork (see the inline comments below); arenadata/gpdb builds without
-# them.
 set -eo pipefail
 
 repo="$1"
 ref="$2"
-mode="${3:-}"
 
-git clone "$repo" -b "$ref" --depth 1 gpdb
-cd gpdb
-git submodule update --init
+mode="${3:-}"
 
-configure_extra=()
 if [ "$mode" = "open-gpdb" ]; then
-  # ORCA in open-gpdb still builds with -std=c++98/gnu++98, but the system
-  # Xerces-C 3.2 (Ubuntu 22.04) requires C++11 (char16_t); bump the ORCA C++
-  # standard to gnu++14 (gnu++17 would reject ORCA's deprecated throw() specs).
-  # gnu++14 + -Wextra then surfaces -Wdeprecated-copy / -Wnonnull-compare which
-  # ORCA's -Werror turns fatal, so append -Wno-error=... last (wins over it).
+  git clone "$repo" -b "$ref" --depth 1 gpdb
+  cd gpdb
+  git submodule update --init
+
+  configure_extra=()
   for mk in src/backend/gpopt/gpopt.mk \
             src/backend/gporca/gporca.mk \
             src/backend/gporca/libgpos/src/common/Makefile; do
     sed -i 's/-std=gnu++98/-std=gnu++14/g; s/-std=c++98/-std=gnu++14/g' "$mk"
     printf '\noverride CPPFLAGS := $(CPPFLAGS) -Wno-error=deprecated-copy -Wno-error=nonnull-compare\n' >> "$mk"
   done
-  # open-gpdb defaults --with-mdblocales=yes and hard-requires the mdblocales
-  # lib/header, which is not available on the CI image.
   configure_extra+=(--without-mdblocales)
-fi
 
-# TODO(gmusya): consider using --enable-cassert
-./configure --with-perl --with-python --with-libxml --with-gssapi \
-  --with-pythonsrc-ext "${configure_extra[@]}" --prefix="$HOME/local/gpdb"
+  ./configure --with-perl --with-python --with-libxml --with-gssapi \
+    --with-pythonsrc-ext "${configure_extra[@]}" --prefix="$HOME/local/gpdb"
 
-if [ "$mode" = "open-gpdb" ]; then
-  # src/common (FRONTEND) includes the backend-generated utils/errcodes.h but
-  # has no order-only dep on it, so -j8 races ("errcodes.h: No such file").
-  # Force the generated header first.
   make -C src/backend submake-errcodes
+  make -j8
+  make -j8 install
+
+  cd ..
+  rm -rf gpdb
+  exit 0
 fi
 
-make -j8
-make -j8 install
+TARGET_DIR="$HOME/local/gpdb"
+PACKAGE_URL="https://github.com/GreengageDB/greengage/releases/download/6.29.2/greengage6.deb"
+
+deb_file=$(mktemp --suffix=.deb)
+curl -sL -o "$deb_file" "$PACKAGE_URL"
+mkdir -p "$TARGET_DIR"
+sudo dpkg -x "$deb_file" "$TARGET_DIR"
+rm -f "$deb_file"
+
+sudo chown -R "$USER:$USER" "$TARGET_DIR"
+
+SRC_PATH="$TARGET_DIR/opt/greengagedb/greengage"
+if [ -d "$SRC_PATH" ]; then
+  mv "$SRC_PATH"/* "$TARGET_DIR/"
+  mv "$SRC_PATH"/.* "$TARGET_DIR/" 2>/dev/null || true
+  rm -rf "$TARGET_DIR/opt"
+fi
+
+if [ -f "$TARGET_DIR/greengage_path.sh" ]; then
+  ln -sf greengage_path.sh "$TARGET_DIR/greenplum_path.sh"
+fi
 
-cd ..
-rm -rf gpdb
+"$TARGET_DIR/bin/postgres" --version >/dev/null 2>&1