Flox environment package resolution of implicit vs explicit options.systems

postgresql.txt

:postgresql$ flox init && flox install postgresql && flox list
⚡︎ Created environment 'postgresql' (aarch64-darwin)

Next:
  $ flox search <package>    <- Search for a package
  $ flox install <package>   <- Install a package into an environment
  $ flox activate            <- Enter the environment
  $ flox edit                <- Add environment variables and shell hooks
  $ flox push                <- Use the environment from other machines or
                                share it with someone on FloxHub

✔ 'postgresql' installed to environment 'postgresql'
ℹ 'postgresql' has additional outputs, use 'flox list -a' to see more
postgresql: postgresql (17.10)
> Auto-activate the environment in '/private/tmp/postgresql'? No
ℹ Disabled auto-activation for the environment.
Run 'flox activate allow --dir <PATH>' to re-enable.
:postgresql$ flox edit
✔ Environment successfully updated.
:postgresql$ cat .flox/env/manifest.toml | grep systems
systems = ["aarch64-darwin"]
:postgresql$ flox upgrade && flox list
✔ Upgraded 1 version change in 'postgresql':
- postgresql: 17.10 -> 18.4

postgresql: postgresql (18.4)