diff --git a/Dockerfile b/Dockerfile
index ede7f3f..a05fe76 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -9,6 +9,7 @@ RUN \
         DEBIAN_FRONTEND=noninteractive apt-get install -y tzdata && \
         apt-get install -y \
 			cmake \
+			ctags \
 			gcc \
 			g++ \
 			git \
@@ -32,6 +33,8 @@ WORKDIR /opt
 
 # COPY git-keys /root/.ssh/known_hosts
 
+ARG srcid=0
+
 RUN git clone https://git.braxo.se/daniel/autofw.git
 
 WORKDIR /opt/autofw/src
diff --git a/build.sh b/build.sh
index 3d41671..e21d379 100755
--- a/build.sh
+++ b/build.sh
@@ -6,9 +6,12 @@ img=autofw-$arch
 
 # ssh-keyscan git.braxo.se > git-keys
 
+srcid=`git ls-remote https://git.braxo.se/daniel/autofw.git refs/heads/main | cut -c-40`
+
 export DOCKER_BUILDKIT=1
 
 docker build \
+	--build-arg srcid=$srcid \
 	--platform $pf \
 	-t $img \
 	.