diff --git a/.travis.yml b/.travis.yml
index 6509f7d..4b5db4f 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -19,14 +19,17 @@ install:
 script:
   - scripts/checkcode.sh .
   - docker build -t kasproject/kas .
+  - docker build -t kasproject/kas-isar -f Dockerfile.isar .
 
 after_success:
   - if [ "$TRAVIS_BRANCH" == "master" ] || [ "$TRAVIS_BRANCH" == "next" ]; then
         docker login -u="$DOCKER_USERNAME" -p="$DOCKER_PASSWORD";
-        docker push kasproject/kas;
-        if [ "$TRAVIS_BRANCH" == "master" ] && git describe --exact-match 2>/dev/null >/dev/null; then
-            VERSION="$(/usr/bin/python3 -c 'from kas.__version__ import __version__; print(__version__)')";
-            docker tag kasproject/kas kasproject/kas:$VERSION;
-            docker push kasproject/kas:$VERSION;
-        fi
+        for IMAGE in kasproject/kas kasproject/kas-isar; do
+            docker push $IMAGE;
+            if [ "$TRAVIS_BRANCH" == "master" ] && git describe --exact-match 2>/dev/null >/dev/null; then
+                VERSION="$(/usr/bin/python3 -c 'from kas import __version__; print(__version__)')";
+                docker tag $IMAGE $IMAGE:$VERSION;
+                docker push $IMAGE:$VERSION;
+            fi
+        done
     fi
diff --git a/Dockerfile.isar b/Dockerfile.isar
new file mode 100644
index 0000000..0119720
--- /dev/null
+++ b/Dockerfile.isar
@@ -0,0 +1,22 @@
+FROM kasproject/kas:latest
+
+ENV DEBIAN_FRONTEND noninteractive
+
+RUN echo 'deb http://deb.debian.org/debian jessie-backports main' >> /etc/apt/sources.list.d/backports.list && \
+    echo 'deb http://deb.debian.org/debian stretch main' >> /etc/apt/sources.list.d/backports.list
+
+ENV LC_ALL=en_US.UTF-8
+RUN apt-get update && \
+    apt-get install -y -f --no-install-recommends --target-release jessie \
+            autoconf automake gdisk libtool bash-completion \
+            sudo grub2 grub-efi-amd64-bin grub-efi-ia32-bin qemu-user-static \
+            reprepro python3 && \
+    apt-get install -y -f --no-install-recommends --target-release jessie-backports \
+            e2fsprogs && \
+    apt-get install -y -f --no-install-recommends --target-release stretch \
+            multistrap && \
+    apt-get clean && \
+    rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp*
+
+RUN echo "builder ALL=NOPASSWD: ALL" > /etc/sudoers.d/builder-nopasswd && \
+    chmod 660 /etc/sudoers.d/builder-nopasswd