It might be too late. The loader that loaded perl is probably the same loader that's loading your shared libraries. It has already initialized and is no longer looking for that environment variable. You probably have to set the variable before invoking perl.

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print map { my ($m)=1<<hex($_)&11?' ':'';
$m.=substr('AHJPacehklnorstu',hex($_),1) }
split //,'2fde0abe76c36c914586c';
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