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  1. or download this
    $ XXX=unset perl -E 'say "$$: XXX=$ENV{XXX}"; print `export XXX=xxx; e
+cho \$\$: XXX=\$XXX`; say "$$: XXX=$ENV{XXX}"'
3494: XXX=unset
3495: XXX=xxx
3494: XXX=unset
  2. or download this
    BEGIN { require Module; Module->import( LIST ); }
  3. or download this
    ok $ENV{whatever} eq $whatever_expected_value, ...
  4. or download this
    DYLD_LIBRARY_PATH=... ORACLE_HOME=... make test