Multiple libraries breaks --only-dependencies

[ekmett]

Run $CABAL v2-build $ARG_COMPILER --disable-tests --disable-benchmarks --dependencies-only -j2 all
Resolving dependencies...
cabal-3.4.0.0-rc4: Cannot select only the dependencies (as requested by the '--only-dependencies' flag), the package unlifted-0 is required by a dependency of one of the other targets.

Describe the bug
I'm working on a package with multiple sub-libraries. I went to use haskell-ci. haskell-ci invokes the old standby cabal build --dependencies-only, which fails because it thinks the package depends on itself (which it does) and that this should stop it from installing other packages (which it shouldn't)

To Reproduce

grab https://github.com/ekmett/unlifted commit 2801d0892cc073304e57174b0b5c
cabal build --only-dependencies

If I build with cabal build --only-dependencies unlifted it succeeds.

Expected behavior
I'd expect this to succeed as usual.

System information

• OSX
• cabal 3.4.0.0-rc7, ghc-9.0.1

[phadej]

Duplicate of #6106