[plt-scheme] compiling PLT from source and ~/.plt-scheme

On Fri, May 15, 2009 at 10:03:53AM -0400, Eli Barzilay wrote:
> On May 15, Tom Schouten wrote:
> > Hello,
> > 
> > Is there a way to compile PLT Scheme from source without setup-plt
> > looking in the compiling user's ~/.plt-scheme directory for
> > collections?
> 
> Use `make plain-install' to avoid running setup-plt, and then run it
> manually with
> 
>   .../mzscheme -l- setup -U


Thanks.  This made me find the relevant line in Makefile.in:

SETUP_ARGS = -X "$(DESTDIR)$(collectsdir)" -l setup

Is there a reason why the "-U" option is omitted by default?