Building OpenJDK 9 with OpenJFX 9 on Ubuntu (VBox and WSL)

Wanting to test Windows Subsystem for Linux, I've refreshed my steps for building on Ubuntu.
(Dependencies come from the helpful configure messages for the JDK and from the OpenJFX wiki)

Quick steps for installing WSL:

1. Activate the developer's mode in settings
2. In an administrator PowerShell console run:
   

   Enable-WindowsOptionalFeature -Online -FeatureName Microsoft-Windows-Subsystem-Linux

3. Open Bash and install Ubuntu

 (the following also applies to a VirtualBox VM)

 To build OpenJFX and OpenJDK 9:

1. Install the dependencies:
   

   sudo apt install mercurial openjdk-8-jdk make unzip zip g++ libx11-dev libxext-dev libxrender-dev libxtst-dev libcups2-dev libfreetype6-dev libasound2-dev ksh bison flex gperf libasound2-dev libgl1-mesa-dev libgstreamer0.10-dev libgstreamer-plugins-base0.10-dev libjpeg-dev libpng-dev libxml2-dev libxslt1-dev libxt-dev libxxf86vm-dev pkg-config x11proto-core-dev x11proto-xf86vidmode-dev libavcodec-dev libgtk2.0-dev libgtk-3-dev libxtst-dev libudev-dev libavformat-dev

2. Create the dev directory:
   

   mkdir ~/dev
   cd ~/dev

3. Retrieve specific dependencies for OpenJFX:
   

   wget https://services.gradle.org/distributions/gradle-3.1-bin.zip
   unzip gradle-3.1-bin.zip
   export PATH=$PATH:~/dev/gradle-3.1/bin
   
   wget http://archive.apache.org/dist/ant/binaries/apache-ant-1.8.2-bin.zip
   unzip apache-ant-1.8.2-bin.zip
   export PATH=$PATH:~/dev/apache-ant-1.8.2/bin
   
   wget http://download.java.net/java/jdk9/archive/168/binaries/jdk-9-ea+168_linux-x64_bin.tar.gz
   gunzip jdk-9-ea+168_linux-x64_bin.tar.gz
   tar x -f jdk-9-ea+168_linux-x64_bin.tar

4. Get the sources:
   

   hg clone http://hg.openjdk.java.net/openjfx/9-dev/rt jfx
   
   hg clone http://hg.openjdk.java.net/jdk9/jdk9/
   cd ~/dev/jdk9
   bash ./get_source.sh

5. Set the env variables for OpenJFX:
   

   export _JAVA_OPTIONS="-Dsun.reflect.debugModuleAccessChecks=true --add-opens=java.base/java.lang=ALL-UNNAMED --add-opens=java.base/java.util=ALL-UNNAMED --add-opens=java.base/java.lang.invoke=ALL-UNNAMED --add-opens=java.base/java.io=ALL-UNNAMED --add-opens=java.base/java.util.concurrent=ALL-UNNAMED --add-opens=java.base/java.text=ALL-UNNAMED -Dorg.gradle.daemon=false"
   
   export JAVA_HOME=~/dev/jdk-9/
   export JDK_HOME=~/dev/jdk-9/

6. Build OpenJFX:
   

   cd ~/dev/jfx
   gradle

7. Unset the env variables for OpenJFX (to avoid interfering with the configuration of OpenJDK):
   

   export -n _JAVA_OPTIONS
   export -n JAVA_HOME

8. Configure and Build OpenJDK:
   

   cd ~/dev/jdk9
   bash configure --with-import-modules=`echo ~/dev/jfx/build/modular-sdk/`
   make images

9. Enjoy