Typing "make update" in coyotos/src fires up this error:
hg: unknown command 'fetch'
The patch is to substitute 'fetch' with 'update' in the "update:" target.
Change the line:
hg --cwd $(HG_TREETOP)/$${tree} fetch; \
To read:
hg --cwd $(HG_TREETOP)/$${tree} update; \
val