this is in the imperative. 'You don't sleep here' would be 'Hulali hapa'
For 2nd person statements versus commands in the negative, 95% of the time, the suffix of the stem verb will change to '-i' in a statement, and '-e' in a command, if the stem verb suffix is '-a'.
i kuamka' - 'You don't wake up late' (habitual)
e kuamka' - 'Don't wake up late'
'Don't' (imperative) translates to the prefix 'Usi-' in singular and 'Msi-' in plural