diff --git a/docker/frontend/Dockerfile b/docker/frontend/Dockerfile
index 29e048437..781cfec2a 100644
--- a/docker/frontend/Dockerfile
+++ b/docker/frontend/Dockerfile
@@ -23,7 +23,7 @@ ENV NODE_EXTRA_CA_CERTS: "/etc/ssl/certs/ca-certificates.crt"
 # locally these two should be identical, so that compilation results are written out into the file dir.
 # in CI-pipelines these two should be different, so that the container caches the compilation results.
 ARG MOUNT_DIR=/mnt/fradrive
-ARG PROJECT_DIR=/fradrive
+ENV PROJECT_DIR=/fradrive
 RUN mkdir -p ${PROJECT_DIR}
 RUN --mount=type=bind,source=.,target=${MOUNT_DIR},rw if [ "${PROJECT_DIR}" != "${MOUNT_DIR}" ] ; then cp -r ${MOUNT_DIR}/* ${PROJECT_DIR} ; fi
 WORKDIR ${PROJECT_DIR}
@@ -36,4 +36,4 @@ printf 'registry=https://pkgs.dev.azure.com/fraport/_packaging/packages/npm/regi
 RUN make -- --dependencies-frontend IN_CONTAINER=true
 
 ENV FRADRIVE_MAKE_TARGET=--compile-frontend
-ENTRYPOINT make -- ${FRADRIVE_MAKE_TARGET} IN_CONTAINER=true CHROME_BIN=${CHROME_BIN}
\ No newline at end of file
+ENTRYPOINT make -- ${FRADRIVE_MAKE_TARGET} IN_CONTAINER=true CHROME_BIN=${CHROME_BIN} PROJECT_DIR=${PROJECT_DIR}
\ No newline at end of file