puppet acts like a module's subcommand doesn't exist if given a bad --environmentpath

[root@x4md2fnxgqxvoz2 ~]# puppet preview --environmentpath /nonesuch

Error: Unknown Puppet subcommand 'preview'

See 'puppet help' for help on available puppet subcommands

[root@x4md2fnxgqxvoz2 ~]# puppet preview --help

puppet-preview(8) -- Puppet catalog preview compiler

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SYNOPSIS

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Compiles two catalogs: one in the baseline environment and one in a preview environment