"failed to import extension hgext.imerge" warning on Dreamhost

Trying to push some new code to a Hg repository on my Dreamhost account, I had the following error message:

remote: *** failed to import extension hgext.imerge: No module named imerge

I used to have the same kind of issues with an other extensions, hgext/hbisect a while ago and I fixed it by forcing Hg to not use this extension.

Here's how:

Edit your .hgrc file and under the [extensions] category, add hgext.imerge=!, like this

[extensions]
hgext/hbisect = !
hgext.imerge=!

This should stop the warning.