diff --git a/.github/actions/build-opencl-clang/action.yml b/.github/actions/build-opencl-clang/action.yml
index 1a855bd7c..2594c090e 100644
--- a/.github/actions/build-opencl-clang/action.yml
+++ b/.github/actions/build-opencl-clang/action.yml
@@ -28,6 +28,10 @@ runs:
         git config --global user.name "Action Bot"
       shell: bash
 
+    - name: Install dependencies
+      shell: bash
+      run: sudo apt-get update -y && sudo apt-get install -y cmake build-essential ninja-build
+
     - name: Checkout LLVM
       uses: actions/checkout@a5ac7e51b41094c92402da3b24376905380afc29 # v4.1.6
       with:
@@ -51,18 +55,19 @@ runs:
     - name: Configure
       shell: bash
       run: |
-        mkdir build && cd build
-        cmake ${{ github.workspace }}/llvm-project/llvm      \
+        builddir=${{ github.workspace }}/build
+        cmake -B "$builddir" \
+          ${{ github.workspace }}/llvm-project/llvm      \
           -DLLVM_ENABLE_PROJECTS="clang"                     \
           -DLLVM_EXTERNAL_PROJECTS="llvm-spirv;opencl-clang" \
           -DLLVM_EXTERNAL_LLVM_SPIRV_SOURCE_DIR=${{ github.workspace }}/llvm-project/SPIRV-LLVM-Translator \
           -DLLVM_EXTERNAL_OPENCL_CLANG_SOURCE_DIR=${{ github.workspace }}/llvm-project/opencl-clang        \
           -DCMAKE_BUILD_TYPE=${{ inputs.build_type }}  \
           -DLLVM_TARGETS_TO_BUILD="X86" \
-          -G "Unix Makefiles"
+          -G Ninja
 
     - name: Build
       shell: bash
       run: |
-        cd build
-        make opencl-clang -j8
+        builddir=${{ github.workspace }}/build
+        ninja -C "$builddir" opencl-clang -j$(nproc)
diff --git a/.github/workflows/codeql.yml b/.github/workflows/codeql.yml
index dcda35b50..f50ac6738 100644
--- a/.github/workflows/codeql.yml
+++ b/.github/workflows/codeql.yml
@@ -17,7 +17,7 @@ jobs:
   analyze:
     name: Analyze
 
-    runs-on: ubuntu-24.04
+    runs-on: rss-ubuntu-2404
 
     permissions:
       # required for all workflows
@@ -35,9 +35,12 @@ jobs:
 
     steps:
 
+      - name: Install build dependencies
+        run: sudo apt-get update -y && sudo apt-get install -y cmake build-essential ninja-build curl
+
       - name: Install llvm and its dependencies
         run: |
-          wget -qO- https://apt.llvm.org/llvm-snapshot.gpg.key | gpg --dearmor | sudo tee /etc/apt/keyrings/llvm.gpg > /dev/null
+          curl -fsSL https://apt.llvm.org/llvm-snapshot.gpg.key | gpg --dearmor | sudo tee /etc/apt/keyrings/llvm.gpg > /dev/null
           echo "deb [signed-by=/etc/apt/keyrings/llvm.gpg] https://apt.llvm.org/noble/ llvm-toolchain-noble main" | sudo tee /etc/apt/sources.list.d/llvm.list
           sudo apt-get update
           sudo apt-get -yq --no-install-suggests --no-install-recommends install \
@@ -74,9 +77,10 @@ jobs:
             ${{ github.workspace }}/SPIRV-LLVM-Translator \
             -DLLVM_INCLUDE_TESTS=OFF \
             -DCMAKE_INSTALL_PREFIX="$builddir"/install \
-            -DCMAKE_BUILD_TYPE=Release
-          cmake --build "$builddir" -j $(nproc)
-          cmake --install "$builddir"
+            -DCMAKE_BUILD_TYPE=Release \
+            -GNinja
+          ninja -C "$builddir" -j$(nproc)
+          ninja -C "$builddir" install
           echo "spirv_translator_install_dir=${builddir}/install" >> $GITHUB_ENV
 
       - name: Initialize CodeQL
@@ -87,13 +91,15 @@ jobs:
 
       - name: Build opencl-clang
         run: |
-          mkdir build && cd build
-          cmake ${{ github.workspace }} \
+          builddir=${{ github.workspace }}/build
+          cmake -B "$builddir" \
+            ${{ github.workspace }} \
             -DPREFERRED_LLVM_VERSION="${{ env.LLVM_VERSION }}.${{ env.LLVM_VERSION_MINOR }}" \
             -DLLVMSPIRV_INCLUDED_IN_LLVM=OFF \
             -DSPIRV_TRANSLATOR_DIR=${{ env.spirv_translator_install_dir }} \
-            -DCMAKE_BUILD_TYPE=Release
-          cmake --build . -j $(nproc)
+            -DCMAKE_BUILD_TYPE=Release \
+            -GNinja
+          ninja -C "$builddir" -j$(nproc)
 
       - name: Perform CodeQL Analysis
         uses: github/codeql-action/analyze@c10b8064de6f491fea524254123dbe5e09572f13 # v4.35.1
diff --git a/.github/workflows/on-demand-verification.yml b/.github/workflows/on-demand-verification.yml
index bd3cbf59b..227d8e0e8 100644
--- a/.github/workflows/on-demand-verification.yml
+++ b/.github/workflows/on-demand-verification.yml
@@ -36,7 +36,7 @@ on:
 jobs:
 
   verify_on_demand:
-    runs-on: ubuntu-24.04
+    runs-on: rss-ubuntu-2404
     steps:
 
       - name: Checkout opencl-clang sources for action files availabilty
diff --git a/.github/workflows/on-push-verification-in-tree.yml b/.github/workflows/on-push-verification-in-tree.yml
index fc4ee4142..b3f53ebce 100644
--- a/.github/workflows/on-push-verification-in-tree.yml
+++ b/.github/workflows/on-push-verification-in-tree.yml
@@ -31,7 +31,7 @@ jobs:
     name: Linux
     # ref_name for 'on: push'
     # base_ref for 'on: pull_request'
-    runs-on: ubuntu-24.04
+    runs-on: rss-ubuntu-2404
     steps:
 
       - name: Checkout opencl-clang sources for action files
diff --git a/.github/workflows/on-push-verification-out-of-tree.yml b/.github/workflows/on-push-verification-out-of-tree.yml
index f334453ee..3ee7bf755 100644
--- a/.github/workflows/on-push-verification-out-of-tree.yml
+++ b/.github/workflows/on-push-verification-out-of-tree.yml
@@ -31,12 +31,15 @@ jobs:
     name: linux
     # ref_name for 'on: push'
     # base_ref for 'on: pull_request'
-    runs-on: ubuntu-24.04
+    runs-on: rss-ubuntu-2404
     steps:
 
+      - name: Install build dependencies
+        run: sudo apt-get update -y && sudo apt-get install -y cmake build-essential ninja-build curl
+
       - name: Install llvm and its dependencies
         run: |
-          wget -qO- https://apt.llvm.org/llvm-snapshot.gpg.key | gpg --dearmor | sudo tee /etc/apt/keyrings/llvm.gpg > /dev/null
+          curl -fsSL https://apt.llvm.org/llvm-snapshot.gpg.key | gpg --dearmor | sudo tee /etc/apt/keyrings/llvm.gpg > /dev/null
           echo "deb [signed-by=/etc/apt/keyrings/llvm.gpg] https://apt.llvm.org/noble/ llvm-toolchain-noble main" | sudo tee /etc/apt/sources.list.d/llvm.list
           sudo apt-get update
           sudo apt-get -yq --no-install-suggests --no-install-recommends install \
@@ -68,9 +71,10 @@ jobs:
             ${{ github.workspace }}/SPIRV-LLVM-Translator \
             -DLLVM_INCLUDE_TESTS=OFF \
             -DCMAKE_INSTALL_PREFIX="$builddir"/install \
-            -DCMAKE_BUILD_TYPE=Release
-          cmake --build "$builddir" -j $(nproc)
-          cmake --install "$builddir"
+            -DCMAKE_BUILD_TYPE=Release \
+            -GNinja
+          ninja -C "$builddir" -j$(nproc)
+          ninja -C "$builddir" install
           echo "spirv_translator_install_dir=${builddir}/install" >> $GITHUB_ENV
 
       - name: Checkout opencl-clang sources
@@ -81,10 +85,12 @@ jobs:
 
       - name: Build opencl-clang
         run: |
-          mkdir build && cd build
-          cmake ${{ github.workspace }}/opencl-clang \
+          builddir=${{ github.workspace }}/build
+          cmake  -B "$builddir" \
+            ${{ github.workspace }}/opencl-clang \
             -DPREFERRED_LLVM_VERSION="${{ env.LLVM_VERSION }}.${{ env.LLVM_VERSION_MINOR }}" \
             -DLLVMSPIRV_INCLUDED_IN_LLVM=OFF \
             -DSPIRV_TRANSLATOR_DIR=${{ env.spirv_translator_install_dir }} \
-            -DCMAKE_BUILD_TYPE=Release
-          cmake --build . -j $(nproc)
+            -DCMAKE_BUILD_TYPE=Release \
+            -GNinja
+          ninja -C "$builddir" -j$(nproc)
diff --git a/.github/workflows/scheduled-verification.yml b/.github/workflows/scheduled-verification.yml
index ddb00fb00..a94bea4d1 100644
--- a/.github/workflows/scheduled-verification.yml
+++ b/.github/workflows/scheduled-verification.yml
@@ -17,7 +17,7 @@ jobs:
 
   verify-default-branches:
     name: Verify `main` branch
-    runs-on: ubuntu-24.04
+    runs-on: rss-ubuntu-2404
     steps:
 
       - name: Checkout opencl-clang sources for action files availabilty
@@ -35,7 +35,7 @@ jobs:
     strategy:
       matrix:
         llvm_version: [ 14, 15, 16, 17, 18, 19, 20, 21, 22 ]
-    runs-on: ubuntu-24.04
+    runs-on: rss-ubuntu-2404
     steps:
 
       - name: Checkout opencl-clang sources for action files availabilty