diff --git a/README.rst b/README.rst
index f5675b8..1f8e862 100644
--- a/README.rst
+++ b/README.rst
@@ -35,21 +35,22 @@ If you have not already done so, clone this repository and ``cd`` into it:
 
 Prerequisites
 -------------
-The only required prerequisite is ``wget``. You can install it using:
+
+Install the following prerequisites before using symbiflow-examples:
 
 * For Ubuntu:
 
 .. code:: bash
-   :name: install-wget-ubuntu
+   :name: install-req-ubuntu
 
    apt update && apt install -y wget
 
 * For CentOS:
 
 .. code:: bash
-   :name: install-wget-centos
+   :name: install-req-centos
 
-   yum install -y wget
+   yum install -y wget which
 
 Toolchain installation
 ----------------------
@@ -159,6 +160,8 @@ To build the litex example, run the following commands:
 .. code:: bash
         :name: xc7-litex
 
+        mkdir xc7/litex_demo
+        pushd xc7/litex_demo
         wget https://raw.githubusercontent.com/enjoy-digital/litex/master/litex_setup.py
         chmod +x litex_setup.py
         ./litex_setup.py init
@@ -167,6 +170,7 @@ To build the litex example, run the following commands:
         tar -xf riscv64-unknown-elf-gcc-8.1.0-2019.01.0-x86_64-linux-ubuntu14.tar.gz
         export PATH=$PATH:$PWD/riscv64-unknown-elf-gcc-8.1.0-2019.01.0-x86_64-linux-ubuntu14/bin/
         pushd litex/litex/boards/targets && ./arty.py --toolchain symbiflow --cpu-type vexriscv --sys-clk-freq 80e6 --no-ident-version --build && popd
+        popd
 
 To build the linux-litex-demo example, run the following commands:
 
diff --git a/README.src.rst b/README.src.rst
index eb6becc..23e8066 100644
--- a/README.src.rst
+++ b/README.src.rst
@@ -35,21 +35,22 @@ If you have not already done so, clone this repository and ``cd`` into it:
 
 Prerequisites
 -------------
-The only required prerequisite is ``wget``. You can install it using:
+
+Install the following prerequisites before using symbiflow-examples:
 
 * For Ubuntu:
 
 .. code:: bash
-   :name: install-wget-ubuntu
+   :name: install-req-ubuntu
 
    apt update && apt install -y wget
 
 * For CentOS:
 
 .. code:: bash
-   :name: install-wget-centos
+   :name: install-req-centos
 
-   yum install -y wget
+   yum install -y wget which
 
 Toolchain installation
 ----------------------
@@ -69,9 +70,9 @@ This section describes how to install the toolchain. This procedure is divided i
 
 2. Choose the install directory
 
-The install directory can either be in your home directory 
-such as ``~/opt/symbiflow`` or in a system directory such as ``/opt/symbiflow``.  
-If you choose a system directory, you will need root permission to perform the installation, 
+The install directory can either be in your home directory
+such as ``~/opt/symbiflow`` or in a system directory such as ``/opt/symbiflow``.
+If you choose a system directory, you will need root permission to perform the installation,
 and so you will need to add some ``sudo`` commands to the instructions below.
 
 .. code:: bash
diff --git a/xc7/README.rst b/xc7/README.rst
index 5941d29..51c9bd5 100644
--- a/xc7/README.rst
+++ b/xc7/README.rst
@@ -42,7 +42,10 @@ Choose the installation directory (see the `README <../README.rst>`_ one level u
         conda env create -f xc7/environment.yml
         conda activate xc7
         mkdir -p $INSTALL_DIR/xc7/install
-        wget -qO- https://storage.googleapis.com/symbiflow-arch-defs/artifacts/prod/foss-fpga-tools/symbiflow-arch-defs/continuous/install/66/20200914-111752/symbiflow-arch-defs-install-05d68df0.tar.xz | tar -xJC $INSTALL_DIR/xc7/install
+        wget -qO- https://storage.googleapis.com/symbiflow-arch-defs/artifacts/prod/foss-fpga-tools/symbiflow-arch-defs/presubmit/install/1049/20201123-030526/symbiflow-arch-defs-install-05bd35c7.tar.xz | tar -xJC $INSTALL_DIR/xc7/install
+        mkdir -p $INSTALL_DIR/xc7/install/share/symbiflow/arch
+        wget -qO- https://storage.googleapis.com/symbiflow-arch-defs/artifacts/prod/foss-fpga-tools/symbiflow-arch-defs/presubmit/install/1049/20201123-030526/symbiflow-xc7a50t_test.tar.xz | tar -xJC $INSTALL_DIR/xc7/install/share/symbiflow/arch
+        wget -qO- https://storage.googleapis.com/symbiflow-arch-defs/artifacts/prod/foss-fpga-tools/symbiflow-arch-defs/presubmit/install/1049/20201123-030526/symbiflow-xc7a100t_test.tar.xz | tar -xJC $INSTALL_DIR/xc7/install/share/symbiflow/arch
         conda deactivate
 
 .. toolchain_include_end_label
@@ -89,6 +92,8 @@ To build the litex example, run the following commands:
 .. code:: bash
         :name: xc7-litex
 
+        mkdir xc7/litex_demo
+        pushd xc7/litex_demo
         wget https://raw.githubusercontent.com/enjoy-digital/litex/master/litex_setup.py
         chmod +x litex_setup.py
         ./litex_setup.py init
@@ -96,7 +101,8 @@ To build the litex example, run the following commands:
         wget https://static.dev.sifive.com/dev-tools/riscv64-unknown-elf-gcc-8.1.0-2019.01.0-x86_64-linux-ubuntu14.tar.gz
         tar -xf riscv64-unknown-elf-gcc-8.1.0-2019.01.0-x86_64-linux-ubuntu14.tar.gz
         export PATH=$PATH:$PWD/riscv64-unknown-elf-gcc-8.1.0-2019.01.0-x86_64-linux-ubuntu14/bin/
-        pushd litex/litex/boards/targets && ./arty.py --toolchain symbiflow --cpu-type vexriscv --build && popd
+        pushd litex/litex/boards/targets && ./arty.py --toolchain symbiflow --cpu-type vexriscv --sys-clk-freq 80e6 --no-ident-version --build && popd
+        popd
 
 To build the linux-litex-demo example, run the following commands: