How to clean a failed package to build?

[Kyunghoon Lee]

Ryan Schmidt wrote:
>
> On Oct 7, 2009, at 12:40, Kyunghoon Lee wrote:
>
>> I was trying to build pang with a quartz option and it failed because 
>> of the option.  I wanted to rebuild pango w/o the quartz option, but 
>> port kept using the same variants option.  I tried to clean, but it 
>> seems "port clean" works only for successfully installed packages.  
>> I'd appreciate it if someone help me clean the unsuccessful install 
>> process so that I can build pango as if I'm building it for the first 
>> time.  Thank you in adv.
>
> What problem did you experience cleaning pango? "sudo port clean 
> pango" cleans the pango work directory and should be all you need. 
> Cleaning an already-installed port probably isn't useful most of the 
> time, since MacPorts cleans a port automatically after it installs it.
After I failed to build pango, I tried again and get the following message:
Error: Requrested variants "+macosx" do not match original selection 
"+macosx+quartz".
Please use the same variants again, perform 'port clean pango' or 
specify the force option (-f).

Is it safe to use the '-f' option in this case to build pango w/o the 
quartz option?