diff --git a/dockerfiles/credentials.Dockerfile b/dockerfiles/credentials.Dockerfile
index 3412a73..88b6b75 100644
--- a/dockerfiles/credentials.Dockerfile
+++ b/dockerfiles/credentials.Dockerfile
@@ -12,7 +12,7 @@ ENV TZ=UTC
 ENV TERM=xterm-256color
 ENV DEBIAN_FRONTEND=noninteractive
 ENV ATLAS_OPTIONS="--repository=$OPENEDX_TRANSLATIONS_REPO"
-ENV ATLAS_EXTRA_SOURCES="--repository=$OPENEDX_ATLAS_EXTRA_SOURCES"
+ENV ATLAS_EXTRA_SOURCES="$OPENEDX_ATLAS_EXTRA_SOURCES"
 
 # software-properties-common is needed to setup our Python 3.12 env
 RUN apt-get update && \
@@ -137,7 +137,7 @@ USER root
 
 ARG OPENEDX_ATLAS_EXTRA_SOURCES
 ARG OPENEDX_TRANSLATIONS_REPO
-ENV ATLAS_EXTRA_SOURCES="--repository=$OPENEDX_ATLAS_EXTRA_SOURCES"
+ENV ATLAS_EXTRA_SOURCES="$OPENEDX_ATLAS_EXTRA_SOURCES"
 
 
 RUN curl -L -o credentials/settings/devstack.py https://raw.githubusercontent.com/edx/devstack/${CREDENTIALS_SERVICE_VERSION}/py_configuration_files/credentials.py
diff --git a/dockerfiles/edx-platform.Dockerfile b/dockerfiles/edx-platform.Dockerfile
index c7d50dc..1e07f62 100644
--- a/dockerfiles/edx-platform.Dockerfile
+++ b/dockerfiles/edx-platform.Dockerfile
@@ -303,7 +303,7 @@ RUN <<EOF
     export LMS_CFG=lms/envs/minimal.yml
     export CMS_CFG=lms/envs/minimal.yml
 
-    export ATLAS_EXTRA_SOURCES="--repository=$OPENEDX_ATLAS_EXTRA_SOURCES"
+    export ATLAS_EXTRA_SOURCES="$OPENEDX_ATLAS_EXTRA_SOURCES"
     export ATLAS_OPTIONS="--revision=$OPENEDX_TRANSLATIONS_VERSION --repository=$OPENEDX_TRANSLATIONS_REPO"
     make pull_translations
 EOF