hello I am new to haskell/cabal so this might be a stupid question but i couldn't find it anywhere. When I try to build a cabal package it correctly list the dependencies. cabal build main

In order, the following will be built (use -v for more details):
 - dependency-1.0
cabal: Failed to build dependency-1.0

so then I do

cabal build dependency

and it build fine listing the correct version. I go back to cabal build main and it still fails. And what is more weird when I go to build the dependency again it says build required

There are 2 questions. Why would it fail in the main if it build by itself just fine. And also even if I run cabal build dependency over and over it always says build required, like it isn't caching anything? Is this normal?