This:

```
parameters_dev.yml.dist
   my_key: todays_timestamp_{$timestamp}

```

would generate:

```
parameters.yml
   my_key: todays_timestamp_9845712365

```

after running `composer install`

Is this possible yet or any workaround? What I'm trying to achieve is, everytime when I run `composer install`, `my_key` will have a unique value.

---

**UPDATE**

config.yml

```
doctrine_cache:
    providers:
        my_memcached_cache:
            namespace: %cache_namespace%

```

parameters.yml

```
parameters:
    cache_namespace: todays_timestamp_

```

Memcache stats will always be like this:

```
Server 127.0.0.1:11211
stats cachedump 12 100

Server 127.0.0.1:11211
ITEM todays_timestamp_[My\Bundle\Acc][1] [1807 b; 1438597305 s]
ITEM todays_timestamp_[My\Bundle\Mer][1] [1707 b; 1438597305 s]
.....
.....
END

```

but I want `todays_timestamp_` to be changed all the time with attaching a unique suffix to it.