How to clean a failed package to build?

[Kyunghoon Lee]

Ryan Schmidt wrote:
>
> On Oct 7, 2009, at 15:48, Kyunghoon Lee wrote:
>
>> 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. [snip]
>>>
>>> What problem did you experience cleaning pango? [snip]
>>
>> 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?
>
> No, not really. What happens when you "sudo port clean pango" and then 
> try "sudo port install pango" again?
>
Here's what I got:

$ sudo port clean pango
Password:
--->  Cleaning pango
$ sudo port install pango
--->  Computing dependencies for pango
--->  Fetching pango
--->  Verifying checksum(s) for pango
--->  Extracting pango
Error: To install pango without the quartz variant, cairo must be 
installed without the quartz variant.
Error: Target org.macports.extract returned: incompatible cairo installation
Error: Status 1 encountered during processing.

So I guess I need to uninstall & install cario again w/o quartz, then 
try to install pango w/o quartz, right?  BTW, this might be a silly 
question, but what is quartz?