When building a dependency, its (unusedd) internal libraries are also built

[phadej]

% time cabal build vector           
Configuration is affected by the following files:
- cabal.project
- cabal.project.local
Build profile: -w ghc-9.12.1 -O1
In order, the following will be built (use -v for more details):
 - vector-0.13.2.0 (lib) (requires build)
 - vector-0.13.2.0 (lib:benchmarks-O2) (requires build)

The lib:benchmarks-O2 is used only by benchmarks, but it's still built. The vector:lib:vector target is not recognised.