Pkg seems to read dependencies from non-sysimage stdlibs from the stdlib project, even if loaded externally

[KristofferC]

Causes things like

ERROR: LoadError: ArgumentError: Package SparseArrays does not have SuiteSparse_jll in its dependencies:
- You may have a partially installed environment. Try `Pkg.instantiate()`
  to ensure all packages in the environment are installed.
- Or, if you have SparseArrays checked out for development and have
  added SuiteSparse_jll as a dependency but haven't updated your primary
  environment's manifest file, try `Pkg.resolve()`.
- Otherwise you may need to report an issue with SparseArrays

when trying to load SparseArrays master in another package.

[KristofferC]

Also this:

(@v1.10) pkg> activate --temp
  Activating new project at `/tmp/jl_2LoQSO`

(jl_2LoQSO) pkg> add https://github.com/JuliaSparse/SparseArrays.jl/tree/dk/mul!
    Updating git-repo `https://github.com/JuliaSparse/SparseArrays.jl`
   Resolving package versions...
    Updating `/tmp/jl_2LoQSO/Project.toml`
  [2f01184e] + SparseArrays v1.10.0 `https://github.com/JuliaSparse/SparseArrays.jl#dk/mul!`
    Updating `/tmp/jl_2LoQSO/Manifest.toml`
  [0dad84c5] + ArgTools v1.1.1

In [3]: using SparseArrays
ERROR: ArgumentError: Package SparseArrays [2f01184e-e22b-5df5-ae63-d93ebab69eaf] is required but does not seem to be installed:
 - Run `Pkg.instantiate()` to install all recorded dependencies.