python install anomalies - tcl code to set paths

[Ryan Schmidt]

On May 22, 2009, at 15:17, Darren Weber wrote:

> Some revisions on the tcl code above are required because it seems  
> that ${prefix} is not defined when the proc is defined in a global  
> scope for a Portfile (not clear why that is the case).

Try adding "global prefix" at the top of the proc.