diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 204ac9f..d70d70a 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -23,7 +23,7 @@ jobs:
             apt-get update
             apt-get install -y libopencv-dev libegl1-mesa-dev libcamera-dev cmake build-essential libdrm-dev libgbm-dev openjdk-17-jdk
             cmake -B build-pi -DCMAKE_BUILD_TYPE=Release
-            cmake --build build-pi -j 4
+            cmake --build build-pi -- -j
 
     - run: find .
 
@@ -54,3 +54,21 @@ jobs:
       if: startsWith(github.ref, 'refs/tags/v')
       env:
         GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+
+  build-chroot:
+    runs-on: ubuntu-latest
+    container:
+      image: mcm001/photon-libcamera-builder-entry:latest
+    defaults:
+      run:
+        shell: bash
+    steps:
+    - uses: actions/checkout@v3
+    - run: |
+        find .
+        cmake -B build-pi -DCMAKE_BUILD_TYPE=Release
+        cmake --build build-pi -- -j 
+    - uses: actions/upload-artifact@master
+      with:
+        name: libcamera-driver
+        path: build-pi/*.so
diff --git a/CMakeLists.txt b/CMakeLists.txt
index f913fb5..9ca75cf 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 3.16)
+cmake_minimum_required(VERSION 3.15)
 project(libcamera_meme)
 
 set(CMAKE_EXPORT_COMPILE_COMMANDS ON)
diff --git a/Dockerfile b/Dockerfile
new file mode 100644
index 0000000..b866ac7
--- /dev/null
+++ b/Dockerfile
@@ -0,0 +1,3 @@
+FROM photon-libcamera-builder
+
+ENTRYPOINT ["/bin/bash", "/opt/start_chroot.sh"]
\ No newline at end of file
diff --git a/README.md b/README.md
index 793c762..07804ab 100644
--- a/README.md
+++ b/README.md
@@ -30,3 +30,15 @@ This should spit out the shared library into the build directory.
 
 Compile with `g++ -std=c++17 -o eglinfo eglinfo.c headless_opengl.cpp -lEGL -lGLESv2 -lgbm`, and then run with  `./eglinfo`
 
+## Chroot stuff
+
+Using our docker image and run with --privileged
+
+docker run -it --privileged --mount type=bind,source="$(pwd)",target=/opt/photon_sysroot_v2023.4.2/opt/photon-libcamera-gl-driver photon-libcamera-builder:latest
+/opt/photon_sysroot_v2023.4.2/opt/photon-libcamera-gl-driver/start_chroot.sh
+
+Or
+
+docker run -it --privileged --mount type=bind,source="$(pwd)",target=/opt/photon_sysroot_v2023.4.2/opt/photon-libcamera-gl-driver photon-libcamera-builder-entry:latest
+
+# git clone ${{ github.repositoryUrl }} && cd "$(basename "$_" .git)"
\ No newline at end of file