tidy dependencies

Dockerfile

@@ -20,17 +20,14 @@ RUN apt-get update -y && apt-get upgrade -y && \
     busybox \
     curl \
     build-essential \
-    diffutils \
     flex \
     git \
     python3-dev \
-    python3-venv \
     && rm -rf /var/lib/apt/lists/* && \
     busybox --install
 
-# setup a python venv - requried by the RSB to find 'python'
-RUN python3 -m venv ${VIRTUALENV}
-ENV PATH=${VIRTUALENV}/bin:${PATH}
+# RSB looks for 'python'
+RUN ln -s /usr/bin/python3 /usr/bin/python
 
 # get the RTEMS Source Builder
 WORKDIR ${RTEMS_BASE}
@@ -66,9 +63,8 @@ RUN git apply VMEConfig.patch && \
 RUN ./waf && \
     ./waf install
 
-RUN git clone git://git.rtems.org/rtems-net-legacy.git ${RTEMS_BASE}/rtems-net-legacy
-
 # add in the legacy network stack
+RUN git clone git://git.rtems.org/rtems-net-legacy.git ${RTEMS_BASE}/rtems-net-legacy
 WORKDIR ${RTEMS_BASE}/rtems-net-legacy
 RUN git submodule init && \
     git submodule update && \

README.md

@@ -12,23 +12,3 @@ The current configuration is:-
 This container can be run to experiment with building components with the RSP and prebuilt rtems6 toolchain.
 
 See https://docs.rtems.org/branches/master/user/start/index.html
-
-To just get the Board Support Package (BSP) with toolchain, you can extract these products into your own container with:
-
-```
-ENV RTEMS_VERSION=6.1-rc2
-ENV RTEMS_TOP=/rtems${RTEMS_VERSION}-beatnik-legacy/rtems/${RTEMS_VERSION}/
-ENV RTEMS_BSP_IMAGE=ghcr.io/epics-containers/rtems6-powerpc-linux-developer
-
-COPY --from=${RTEMS_BSP_IMAGE}:${RTEMS_VERSION} ${RTEMS_TOP} ${RTEMS_TOP}
-```
-
-Or you can get the BSP locally with:
-```
-docker run --rm -v $(pwd):/workdir ghcr.io/epics-containers/rtems6-powerpc-linux-developer:6.1-rc2
-# in another terminal
-mkdir -p /rtems6-beatnik-legacy/rtems/
-docker cp $(docker ps -lq):/rtems6-beatnik-legacy/rtems/6.1-rc2/ /rtems6-beatnik-legacy/rtems/6.1-rc2/
-```
-
-IMPORTANT: the BSP contains absolute paths so you must copy it to the same path as inside the container.