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    <p>Folks,</p>
    <p>The changes to environmental clean-up in version 2.19 were a bit
      overzealous. HALLD_VERSIONS was getting cleaned when it should not
      have been. Thanks to Tyler Hague for pointing out the error. Find
      the release notes for version 2.20 <a moz-do-not-send="true" href="https://github.com/JeffersonLab/build_scripts/releases/tag/2.20">here</a>
      and below. This new version is now installed at JLab.<br>
    </p>
    <p>  -- Mark</p>
    <p>          -----------------------------</p>
    <br>
    <div class="release-header">
      <div class="d-flex flex-items-start">
        <div class="f1 flex-auto min-width-0 text-normal"> <a href="https://github.com/JeffersonLab/build_scripts/releases/tag/2.20">build_scripts
            2.20</a> </div>
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      <ul>
        <li>Revert to not cleaning HALLD_VERSIONS.</li>
        <li><a href="https://github.com/JeffersonLab/build_scripts/compare/2.19...2.120">Differences
            from 2.19</a></li>
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