diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index cc913c35f..029de381c 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -19,8 +19,8 @@ env:
   #
 
   # Sourced from https://vulkan.lunarg.com/sdk/home#linux
-  VULKAN_SDK_VERSION: "1.4.313"
-  VULKAN_FULL_SDK_VERSION: "1.4.313.0"
+  VULKAN_SDK_VERSION: "1.4.321"
+  VULKAN_FULL_SDK_VERSION: "1.4.321.0"
 
   # These Mesa version definition is duplicated in the install-mesa action.
   MESA_VERSION: "24.3.4"
@@ -608,14 +608,16 @@ jobs:
         run: |
           set -e
 
-          sudo apt-get update -y -qq
+          curl -L --retry 5 https://sdk.lunarg.com/sdk/download/${{ env.VULKAN_FULL_SDK_VERSION }}/linux/vulkansdk-linux-x86_64-${{ env.VULKAN_FULL_SDK_VERSION }}.tar.xz -o vulkan-sdk.tar.xz
+          mkdir vulkan-sdk
+          tar xpf vulkan-sdk.tar.xz -C vulkan-sdk
 
-          # vulkan sdk
-          wget -qO - https://packages.lunarg.com/lunarg-signing-key-pub.asc | sudo apt-key add -
-          sudo wget -qO /etc/apt/sources.list.d/lunarg-vulkan-${{ env.VULKAN_SDK_VERSION }}-noble.list https://packages.lunarg.com/vulkan/${{ env.VULKAN_SDK_VERSION }}/lunarg-vulkan-$VULKAN_SDK_VERSION-noble.list
+          mv ./vulkan-sdk/${{ env.VULKAN_FULL_SDK_VERSION }} $HOME/VulkanSDK
+
+          echo "$HOME/VulkanSDK/x86_64/bin" >> "$GITHUB_PATH"
+          echo "LD_LIBRARY_PATH=$HOME/VulkanSDK/x86_64/lib${LD_LIBRARY_PATH:+:$LD_LIBRARY_PATH}" >> "$GITHUB_ENV"
+          echo "VK_ADD_LAYER_PATH=$HOME/VulkanSDK/x86_64/share/vulkan/explicit_layer.d" >> "$GITHUB_ENV"
 
-          sudo apt-get update
-          sudo apt install -y vulkan-sdk
 
       - name: (Linux) Install Mesa
         if: matrix.os == 'ubuntu-24.04'
diff --git a/.github/workflows/shaders.yml b/.github/workflows/shaders.yml
index 084602ff1..9bd574789 100644
--- a/.github/workflows/shaders.yml
+++ b/.github/workflows/shaders.yml
@@ -15,9 +15,8 @@ on:
 
 env:
   # Sourced from https://vulkan.lunarg.com/sdk/home#linux
-  #
-  # We don't include the 4th version number, as it's not used in any URL.
-  VULKAN_SDK_VERSION: "1.4.313"
+  VULKAN_SDK_VERSION: "1.4.321"
+  VULKAN_FULL_SDK_VERSION: "1.4.321.0"
 
 # Every time a PR is pushed to, cancel any previous jobs. This
 # makes us behave nicer to github and get faster turnaround times
@@ -104,14 +103,15 @@ jobs:
         run: |
           set -e
 
-          sudo apt-get update -y -qq
+          curl -L --retry 5 https://sdk.lunarg.com/sdk/download/${{ env.VULKAN_FULL_SDK_VERSION }}/linux/vulkansdk-linux-x86_64-${{ env.VULKAN_FULL_SDK_VERSION }}.tar.xz -o vulkan-sdk.tar.xz
+          mkdir vulkan-sdk
+          tar xpf vulkan-sdk.tar.xz -C vulkan-sdk
 
-          # vulkan sdk
-          wget -qO - https://packages.lunarg.com/lunarg-signing-key-pub.asc | sudo apt-key add -
-          sudo wget -qO /etc/apt/sources.list.d/lunarg-vulkan-$VULKAN_SDK_VERSION-noble.list https://packages.lunarg.com/vulkan/$VULKAN_SDK_VERSION/lunarg-vulkan-$VULKAN_SDK_VERSION-noble.list
+          mv ./vulkan-sdk/${{ env.VULKAN_FULL_SDK_VERSION }} $HOME/VulkanSDK
 
-          sudo apt-get update
-          sudo apt install -y vulkan-sdk
+          echo "$HOME/VulkanSDK/x86_64/bin" >> "$GITHUB_PATH"
+          echo "LD_LIBRARY_PATH=$HOME/VulkanSDK/x86_64/lib${LD_LIBRARY_PATH:+:$LD_LIBRARY_PATH}" >> "$GITHUB_ENV"
+          echo "VK_ADD_LAYER_PATH=$HOME/VulkanSDK/x86_64/share/vulkan/explicit_layer.d" >> "$GITHUB_ENV"
 
       - name: Install Graphviz
         run: sudo apt-get install graphviz