The documentation for command line arguments to MzScheme says:
-p <file> <u> <path> : requires (planet "<file>" "<user>" "<pkg>")
http://docs.plt-scheme.org/reference/running-sa.html#(part._mz-cmdline)
Running mzscheme --help says:
-p <package> : Like -e '(require (planet "<package>")'
Experiments confirm the executable is correct and the docs are wrong.
svn: r15597