diff --git a/Dockerfile.ocp b/Dockerfile.ocp
index 0782bca43..4d1d36ad7 100644
--- a/Dockerfile.ocp
+++ b/Dockerfile.ocp
@@ -21,7 +21,9 @@ RUN if [ $(uname -m) = "x86_64" ]; then \
 
 FROM registry.svc.ci.openshift.org/ocp/builder:rhel-8-base-openshift-4.6
 
-COPY ./main-packages-list.txt /tmp/main-packages-list.txt
+ARG PKGS_LIST=main-packages-list.txt
+
+COPY ${PKGS_LIST} /tmp/main-packages-list.txt
 
 RUN dnf upgrade -y && \
     dnf --setopt=install_weak_deps=False install -y $(cat /tmp/main-packages-list.txt) && \
@@ -60,4 +62,3 @@ COPY ./httpd.conf /etc/httpd/conf.d/httpd.conf
 COPY ./httpd-modules.conf /etc/httpd/conf.modules.d/httpd-modules.conf
 
 ENTRYPOINT ["/bin/runironic"]
-