proton-ge-bin: Automate switching to new GE-Proton version after update (#355066)

    # Also leave some breadcrumbs in the file.

    echo "${finalAttrs.pname} should not be installed into environments. Please use programs.steam.extraCompatPackages instead." > $out

    ln -s $src $steamcompattool

    mkdir $steamcompattool

    ln -s $src/* $steamcompattool

    rm $steamcompattool/{compatibilitytool.vdf,proton,version}

    cp $src/{compatibilitytool.vdf,proton,version} $steamcompattool

    sed -i -r 's|GE-Proton[0-9]*-[0-9]*|GE-Proton|' $steamcompattool/compatibilitytool.vdf

    sed -i -r 's|GE-Proton[0-9]*-[0-9]*|GE-Proton|' $steamcompattool/proton

    runHook postBuild

  '';