anchor.diff:    ubuntu-14-04.install-default = makeTest "ubuntu-14-04" "install-default";
     #ubuntu-16-04.install-default = makeTest "ubuntu-16-04" "install-default";
     #ubuntu-22-10.install-default = makeTest "ubuntu-22-10" "install-default";
  +  fedora-36.install-default = makeTest "fedora-36" "install-default";
   }
  
positive.code:         binaryTarball = binaryTarballs.${system};
        }
        ''
          echo "Unpacking Vagrant box..."
          tar xvf $image
  
          qemu-img create -b ./${image.rootDisk} -F vmdk -f qcow2 ./disk.qcow2
  
          echo "Starting qemu..."
          qemu-kvm -m 4096 -nographic \
  
negative.code: 
          echo "Testing Nix installation..."
          # FIXME: should update ~/.bashrc.
          $ssh "source ~/.bash_profile || source ~/.bash_login || source ~/.profile || true; nix-env --version"
  
          echo "Done!"
          touch $out
  