diff --git a/Dockerfile b/Dockerfile
index d7aca784b..02aa0f0d7 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -21,7 +21,8 @@ WORKDIR /opt/letsencrypt
 # If <dest> doesn't exist, it is created along with all missing
 # directories in its path.
 
-COPY bootstrap/ubuntu.sh /opt/letsencrypt/src/
+
+COPY bootstrap/ubuntu.sh /opt/letsencrypt/src/ubuntu.sh
 RUN /opt/letsencrypt/src/ubuntu.sh && \
     apt-get clean && \
     rm -rf /var/lib/apt/lists/* \
diff --git a/Dockerfile-dev b/Dockerfile-dev
index 028366b2c..838b60e8b 100644
--- a/Dockerfile-dev
+++ b/Dockerfile-dev
@@ -22,7 +22,7 @@ WORKDIR /opt/letsencrypt
 
 # TODO: Install non-default Python versions for tox.
 # TODO: Install Apache/Nginx for plugin development.
-COPY bootstrap/ubuntu.sh /opt/letsencrypt/src/
+COPY bootstrap/ubuntu.sh /opt/letsencrypt/src/ubuntu.sh
 RUN /opt/letsencrypt/src/ubuntu.sh && \
     apt-get clean && \
     rm -rf /var/lib/apt/lists/* \