diff --git a/.github/workflows/build-source-image.yml b/.github/workflows/build-source-image.yml
index f673e55..0ebc1c0 100644
--- a/.github/workflows/build-source-image.yml
+++ b/.github/workflows/build-source-image.yml
@@ -41,9 +41,4 @@ jobs:
           tags: 'ghcr.io/mlibrary/dspace-containerization/dspace-source:${{ github.event.inputs.source_image_tag }}'
           file: Dockerfile
           build-args: |
-            BACKEND_GITHUB_USER=mlibrary
-            BACKEND_GITHUB_REPO=DSpace
-            BACKEND_GITHUB_BRANCH=${{ github.event.inputs.source_image_tag }}
-            FRONTEND_GITHUB_USER=mlibrary
-            FRONTEND_GITHUB_REPO=dspace-angular
-            FRONTEND_GITHUB_BRANCH=${{ github.event.inputs.source_image_tag }}
+            GITHUB_BRANCH=${{ github.event.inputs.source_image_tag }}
diff --git a/Dockerfile b/Dockerfile
index 7b3db95..559b2c8 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,12 +1,6 @@
 FROM ubuntu:20.04
 
-ARG BACKEND_GITHUB_USER=mlibrary
-ARG BACKEND_GITHUB_REPO=dspace
-ARG BACKEND_GITHUB_BRANCH=umich
-
-ARG FRONTEND_GITHUB_USER=mlibrary
-ARG FRONTEND_GITHUB_REPO=dspace-angular
-ARG FRONTEND_GITHUB_BRANCH=umich
+ARG GITHUB_BRANCH=umich
 
 RUN apt-get update && \
     apt-get -y install --no-install-recommends \
@@ -15,18 +9,14 @@ RUN apt-get update && \
       wget \
       unzip
 
-ENV BACKEND_GITHUB_USER=${BACKEND_GITHUB_USER}
-ENV BACKEND_GITHUB_REPO=${BACKEND_GITHUB_REPO}
-ENV BACKEND_GITHUB_BRANCH=${BACKEND_GITHUB_BRANCH}
-RUN wget -q https://github.com/${BACKEND_GITHUB_USER}/${BACKEND_GITHUB_REPO}/archive/refs/heads/${BACKEND_GITHUB_BRANCH}.zip && \
-    unzip -q /${BACKEND_GITHUB_BRANCH}.zip -d / && \
-    rm -rf /${BACKEND_GITHUB_BRANCH}.zip && \
-    mv /DSpace-${BACKEND_GITHUB_BRANCH} /DSpace
+ENV GITHUB_BRANCH=${GITHUB_BRANCH}
+
+RUN wget -q https://github.com/mlibrary/dspace/archive/refs/heads/${GITHUB_BRANCH}.zip && \
+    unzip -q /${GITHUB_BRANCH}.zip -d / && \
+    rm -rf /${GITHUB_BRANCH}.zip && \
+    mv /DSpace-${GITHUB_BRANCH} /DSpace
 
-ENV FRONTEND_GITHUB_USER=${FRONTEND_GITHUB_USER}
-ENV FRONTEND_GITHUB_REPO=${FRONTEND_GITHUB_REPO}
-ENV FRONTEND_GITHUB_BRANCH=${FRONTEND_GITHUB_BRANCH}
-RUN wget -q https://github.com/${FRONTEND_GITHUB_USER}/${FRONTEND_GITHUB_REPO}/archive/refs/heads/${FRONTEND_GITHUB_BRANCH}.zip && \
-    unzip -q /${FRONTEND_GITHUB_BRANCH}.zip -d / && \
-    rm -rf /${FRONTEND_GITHUB_BRANCH}.zip && \
-    mv /dspace-angular-${FRONTEND_GITHUB_BRANCH} /dspace-angular
+RUN wget -q https://github.com/mlibrary/dspace-angular/archive/refs/heads/${GITHUB_BRANCH}.zip && \
+    unzip -q /${GITHUB_BRANCH}.zip -d / && \
+    rm -rf /${GITHUB_BRANCH}.zip && \
+    mv /dspace-angular-${GITHUB_BRANCH} /dspace-angular
diff --git a/README.md b/README.md
index db8cd11..0ae301d 100644
--- a/README.md
+++ b/README.md
@@ -20,6 +20,8 @@ docker compose build
 ```
 NOTES:
 
+Build uses `umich` by default. To build with `issue-working`, use "--build-arg GITHUB_BRANCH=issue-working"
+
 Build uses `dspace-7.6` by default. To build with 7_x, use "--build-arg DSPACE_VERSION=7_x"
 
 Build uses `JDK11` by default. To build with JDK17, use "--build-arg JDK_VERSION=17"