Make posix jmavsim

i’m new to px4,i have installed px4 while doing "make posix jmavsim " it is showing error like “no rule to make target posix” can someone help to rectify this

Could you post a screenshot of this? Make sure you have the latest firmware sourcecode. First run git show, then make distclean, then make posix jmavsim again.

I just tried it and it works, so there must be something that isn’t setup correctly.