How to change default saltenv?

I'm trying to change the default saltenv value on my salt master.

I need that all minions get the production environment from my salt master. Il removed the base environment, and made the following configurations :

file_roots:
  production:
    - /srv/salt/production/states
    - /srv/salt/production/formulas
pillar_roots:
  production:
    - /srv/salt/production/pillar

And :

state_top_saltenv: production
default_top: production
top_file_merging_strategy: same

But, when I run :

salt 'myminion' state.highstate I get : No Top file or master_tops data matches found. Please see master log for details.

Running state.apply, it works.

Why is this ? How to get state.apply and state.highstate behave accordingly ?

I came with those settings by trying to understand the documentation, but I know it's not configured the way I want it :

the production environment should be the only one to be selected on minion scheduled run
environments should be isolated, no merging of data from different environments
ability to configure individual minions to run a different saltenv
ability to run a specific saltenv from the master (with saltenv=devel for instance)

Solution

What I have done to move from base saltenv to production one is the following:

in states top.sls, change all base: occurence
in pillars top.sls, do the same
in minion configuration specify its env with saltenv: production

Last step may be unneeded if you use default_top: production.

I think that's all, I have some minimal code with kitchen tests to validate it that I can share if you need it.

update: default_top: production is sufficient for highstates to run correctly, but is not enough if you want to run specific states (with salt <minion> state.sls foo) => you will need to specify saltenv argument in the command-line or add it to your minion config