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I've been having this problem for a while.

My unison profile says:

root = /Users/mylogin
root = ssh://mylogin@mydesktop//home/myloign

I run Unison from everywhere in the world to sync against my Desktop, but sometimes the local network gives my Macbook a funny hostname, like:

In such cases Unison says this is the 1st time I attempt to sync them, and try to start over.

What can I do?

I just want local replica to be the local replica.

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If you find a solution yourself, post it as an "answer" below. – grawity Jan 15 '13 at 19:20
Done. Thank you @grawity. – hectorpal Jan 15 '13 at 22:35

Just set the environment variable UNISONLOCALHOSTNAME to your prefered local host name. For example,

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