diff --git a/.gitignore b/.gitignore
index 65bba00..9e55ce3 100644
--- a/.gitignore
+++ b/.gitignore
@@ -4,4 +4,5 @@ __pycache__/
 
 packages/
 pkgbuilds/
+output/
 run.sh
diff --git a/Dockerfile b/Dockerfile
index 3b5876f..cfc045b 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -11,10 +11,14 @@ ADD scripts/run.sh /tmp
 RUN chmod +x /tmp/build.sh && \
     chmod +x /tmp/run.sh && \
     chmod -R 777 /tmp/pkgbuilds && \
-    chmod 777 /tmp/packages
-RUN /tmp/run.sh
+    /tmp/run.sh && \
+    echo "Build completed!"
+
 
 WORKDIR /tmp/gintctl
 ENTRYPOINT git clone https://gitea.planet-casio.com/Lephenixnoir/gintctl.git . && \
     fxsdk build-cg && \
-    fxsdk build-fx
+    fxsdk build-fx && \
+    cp /tmp/pkgbuilds/**/*.pkg.* /mnt/output/ && \
+    cp /tmp/packages/* /mnt/output/ && \
+    echo "Build completed!"
diff --git a/main.py b/main.py
index 140b89b..c1c7390 100755
--- a/main.py
+++ b/main.py
@@ -45,17 +45,16 @@ def main():
     with open("scripts/run.sh", "w") as file:
         file.write("#!/usr/bin/env bash\n")
         file.write("useradd user\n")
-        file.write("echo 'user  ALL=(ALL) NOPASSWD:ALL' >> /etc/sudoers)\n")
+        file.write("echo 'user  ALL=(ALL) NOPASSWD:ALL' >> /etc/sudoers\n")
         file.write(" && \\\n".join(commands))
 
     if diffs == 0:
         logging.info("no updates planned")
         sys.exit(0)
 
+    docker_build()
+
     # TODO:
-    # - build the container with a tag
-    # - run it
-    # - retreive built packages if everthing is fine
     # - push them to the repository
     # - create a systemd timer to run this script
     # - setup a web server to publish logs in case of failure
diff --git a/scripts/build.sh b/scripts/build.sh
index cf1b971..4ec6053 100644
--- a/scripts/build.sh
+++ b/scripts/build.sh
@@ -1,4 +1,4 @@
 #!/usr/bin/env bash
 
 cd $1
-makepkg -si --noconfirm && cp *.pkg.tar.zst /tmp/packages/
+makepkg -si --noconfirm
diff --git a/utils/__init__.py b/utils/__init__.py
index b7b878b..49861bb 100644
--- a/utils/__init__.py
+++ b/utils/__init__.py
@@ -1,4 +1,5 @@
-from .middlearch import get_package_version, get_package_tarball
 from .config import load_config, clean_directories
+from .docker import docker_build
 from .git import get_tags_from_git
+from .middlearch import get_package_version, get_package_tarball
 from .pkgbuild import render_pkgbuild
diff --git a/utils/config.py b/utils/config.py
index c55c2dc..afd59b8 100644
--- a/utils/config.py
+++ b/utils/config.py
@@ -13,7 +13,7 @@ def load_config(path="packages.yaml"):
     return packages
 
 def clean_directories():
-    for i in ["pkgbuilds", "packages"]:
+    for i in ["pkgbuilds", "packages", "output"]:
         try:
             shutil.rmtree(i)
         except FileNotFoundError:
diff --git a/utils/docker.py b/utils/docker.py
new file mode 100644
index 0000000..dc4eb6d
--- /dev/null
+++ b/utils/docker.py
@@ -0,0 +1,15 @@
+import logging
+import os
+
+def docker_build():
+    def run(cmd, quiet=True):
+        r = os.popen(cmd).read()
+        if not "Build completed!" in r:
+            logging.error(r)
+            logging.error("toolchain build failed")
+            exit(1)
+        if not quiet:
+            logging.info(r)
+
+    run(f"docker build . -t middlearch/ci")
+    run(f"docker run -i --mount type=bind,src=/home/eldeberen/Programmation/Casio/MiddleArch/output,dst=/mnt/output middlearch/ci", quiet=False)