On Thursday, July 21, 2016 at 2:01:14 PM UTC+1, Paul Leopardi wrote:
>
>
> On Thursday, 21 July 2016 22:50:10 UTC+10, Dima Pasechnik wrote:
>>
>> On Thursday, July 21, 2016 at 1:43:22 PM UTC+1, Paul Leopardi wrote:
>>>
>>> ERROR:  The Sage installation tree has moved
>>>
>>> from /home/leopardi/sync/src-downloaded/sage/sage-7.2
>>>   to /home/leopardi/opt/sage/sage-7.2
>>>
>>> This is not supported, and Sage will not work. 
>>>
>>
>> well, this is indeed not supported. Do not move your tree...
>>
>
> Then why do the installation instructions at  
> http://doc.sagemath.org/html/en/installation/source.html#installation-in-a-multiuser-environment
> say "After building Sage, you may optionally copy or move the entire build 
> tree to /usr/local or another location. If you do this, then you must run 
> ./sage once so that various hardcoded locations get updated. For this 
> reason, it might be easier to simply build Sage in its final location."
> Does the build of sage itself use up the "starting Sage the first time" so 
> that the given instructions will never work? If so, should the misleading 
> part of the instructions be deleted?
>

indeed, it is a bad documentation bug (this used to work at some point in 
recent past). 
Thanks for reporting it. I opened https://trac.sagemath.org/ticket/21073
to deal with it.

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