# Pastebin nSG4xb87
    texDONTUSEDirectly = texlive.combine {
      inherit (texlive) scheme-small xpatch phonenumbers helvetic supertabular booktabs xtab xecjk;
    };
    tex = texDONTUSEDirectly.overrideAttrs (
      oldAttrs: {
        allowSubstitutes = false;
      }
    );