diff --git a/scripts/flatpak/org.freedesktop.Platform.VulkanLayer.lsfgvk_23.08.yml b/scripts/flatpak/org.freedesktop.Platform.VulkanLayer.lsfgvk_23.08.yml
index 72c1041..f3a5e3c 100644
--- a/scripts/flatpak/org.freedesktop.Platform.VulkanLayer.lsfgvk_23.08.yml
+++ b/scripts/flatpak/org.freedesktop.Platform.VulkanLayer.lsfgvk_23.08.yml
@@ -19,6 +19,9 @@ modules:
       prepend-ld-library-path: /usr/lib/sdk/llvm18/lib
     config-opts:
       - -DCMAKE_BUILD_TYPE=Release
+      - -DCMAKE_C_COMPILER=clang
+      - -DCMAKE_CXX_COMPILER=clang++
+      - -DCMAKE_INTERPROCEDURAL_OPTIMIZATION=On
     sources:
       - type: git
         url: https://github.com/PancakeTAS/lsfg-vk.git
diff --git a/scripts/flatpak/org.freedesktop.Platform.VulkanLayer.lsfgvk_24.08.yml b/scripts/flatpak/org.freedesktop.Platform.VulkanLayer.lsfgvk_24.08.yml
index bf34b02..7196745 100644
--- a/scripts/flatpak/org.freedesktop.Platform.VulkanLayer.lsfgvk_24.08.yml
+++ b/scripts/flatpak/org.freedesktop.Platform.VulkanLayer.lsfgvk_24.08.yml
@@ -19,6 +19,9 @@ modules:
       prepend-ld-library-path: /usr/lib/sdk/llvm20/lib
     config-opts:
       - -DCMAKE_BUILD_TYPE=Release
+      - -DCMAKE_C_COMPILER=clang
+      - -DCMAKE_CXX_COMPILER=clang++
+      - -DCMAKE_INTERPROCEDURAL_OPTIMIZATION=On
     sources:
       - type: git
         url: https://github.com/PancakeTAS/lsfg-vk.git