diff --git a/.github/workflows/verify.yml b/.github/workflows/verify.yml
index 18dff02..aebc714 100644
--- a/.github/workflows/verify.yml
+++ b/.github/workflows/verify.yml
@@ -73,16 +73,4 @@ jobs:
 
       - name: Run omnibus
         run: |
-          cat <<EOF >>build_docker.sh
-          #!/bin/bash --login
-
-          # install omnibus' dependencies
-          bundle install
-          bundle binstubs --all
-
-          # build the metasploit-framework package
-          bin/omnibus build metasploit-framework
-          EOF
-
-          chmod +x ./build_docker.sh
-          /bin/bash -x -c "docker run --rm --volume $(pwd):$(pwd) --workdir $(pwd) --user jenkins --entrypoint '' ${BUILD_TAG} /bin/bash -l -c './build_docker.sh'"
+          /bin/bash -x -c "docker run --rm --volume $(pwd):$(pwd) --workdir $(pwd) --user jenkins --entrypoint '' ${BUILD_TAG} /bin/bash -l -c 'make'"
diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..17a0709
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,14 @@
+.DEFAULT_GOAL := all
+
+.PHONY: all
+all:
+	# install omnibus' dependencies
+	bundle install
+	bundle binstubs --all
+
+	# build the metasploit-framework package
+	bin/omnibus build metasploit-framework
+
+.PHONY: clean
+clean:
+	bin/omnibus clean metasploit-framework
diff --git a/docker/debian-aarch64/Dockerfile b/docker/debian-aarch64/Dockerfile
index 1cbd1aa..328d371 100644
--- a/docker/debian-aarch64/Dockerfile
+++ b/docker/debian-aarch64/Dockerfile
@@ -56,9 +56,10 @@ RUN /bin/bash -l -c 'cd ~/ && git clone https://github.com/rapid7/metasploit-omn
         cd ~/metasploit-omnibus && bundle install && bundle binstubs --all && cd ~/ && rm -fr metasploit-omnibus'
 
 ENV JENKINS_HOME /home/jenkins
-RUN useradd -d "$JENKINS_HOME" -u 1001 -m -s /bin/sh jenkins
+RUN id jenkins || useradd -d "$JENKINS_HOME" -u 1001 -m -s /bin/sh jenkins
 RUN cp ~/.gitconfig "$JENKINS_HOME"
 RUN chown -R jenkins "$JENKINS_HOME"
+RUN echo "jenkins ALL=(ALL) NOPASSWD: ALL" | tee -a /etc/sudoers
 
 RUN mkdir -p /var/cache/omnibus
 RUN mkdir -p /opt/metasploit-framework
diff --git a/docker/debian-armv7/Dockerfile b/docker/debian-armv7/Dockerfile
index edecc2c..892bd91 100644
--- a/docker/debian-armv7/Dockerfile
+++ b/docker/debian-armv7/Dockerfile
@@ -48,6 +48,7 @@ ENV JENKINS_HOME /home/jenkins
 RUN useradd -d "$JENKINS_HOME" -u 1001 -m -s /bin/sh jenkins
 RUN cp ~/.gitconfig "$JENKINS_HOME"
 RUN chown -R jenkins "$JENKINS_HOME"
+RUN echo "jenkins ALL=(ALL) NOPASSWD: ALL" | tee -a /etc/sudoers
 
 RUN mkdir -p /var/cache/omnibus
 RUN mkdir -p /opt/metasploit-framework