You made a classic shell quoting error - use double quotes for the internal quotes:

perl -le 'package foo ;print eval("__PACKAGE__");'

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or, when your shell only gives you one flavour of quote, use Perls superior quoting facilities:

perl -le 'package foo ;print eval(q(__PACKAGE__));'

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In reply to Re^2: eval('__PACKAGE__') is always main?!!! by Corion
in thread eval('__PACKAGE__') is always main?!!! by gmpassos

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