Scenario 1 dev and prod are subdirectories of herlo

dev

root@dasalt:/srv/salt/herlo# sudo salt-call state.top dev/devtop.sls
[INFO    ] Executing command 'hostname' in directory '/root'
<-- snip -->
[INFO    ] Completed state [nano] at time 15:39:31.434129
local:
----------
          ID: nano
    Function: pkg.installed
      Result: True
     Comment: The following packages were installed/updated: nano.
     Started: 15:39:12.513171
     Duration: 920 ms
     Changes:   
              ----------
              nano:
                  ----------
                  new:
                      2.2.6-1ubuntu1
                  old:
                      

Summary
------------
Succeeded: 1 (changed=1)
Failed:    0
------------
Total states run:     1

gistfile1.txt

root@dasalt:/srv/salt/herlo# tree
.
├── dev
│   ├── devtop.sls
│   └── nano.sls
├── empty.sls
├── prod
│   ├── nonano.sls
│   └── prodtop.sls
└── top.sls

minion

file_roots inside /etc/salt/minion

file_roots:
  base:
    - /srv/salt/herlo
  dev:
    - /srv/salt/herlo/dev
  prod:
    - /srv/salt/herlo/prod

prod

root@dasalt:/srv/salt/herlo# sudo salt-call state.top prod/prodtop.sls
[INFO    ] Executing command 'hostname' in directory '/root'
<-- snip -->
[INFO    ] Completed state [nano] at time 15:44:29.683450
local:
----------
          ID: nano
    Function: pkg.purged
      Result: True
     Comment: All targeted packages were purged.
     Started: 15:44:21.911724
     Duration: 771 ms
     Changes:   
              ----------
              installed:
                  ----------
                  nano:
                      ----------
                      new:
                          
                      old:
                          2.2.6-1ubuntu1
              removed:
                  ----------

Summary
------------
Succeeded: 1 (changed=1)
Failed:    0
------------
Total states run:     1