hg -v update
* However, do not keep mxe-octave build dirs for too long. I'd suggest to wipe a build dir after at most two or three months and start over with a fresh clone a la Step 1.
* Sometimes, when using the "--enable-binary-packages" flag, it happens that Octave-Forge packages with binary modules don't work well on the Windows side. Usually the cause is that the Octave dev version has changed too much since the last cross-build of the OF packages. Solution: just do in <mxe-octave>/:
mxe-octave will rebuild all OF packages then incl. the offending binary modules.
* In the mean time, regularly clean up <mxe-octave build>/log to save disk space. After a first successful build there's no more use for the log subdirs for each package, so you can wipe them all.