hooks: avoid exception when distribution is none

[marcelotduarte]

Fixes #2449

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 79.77%. Comparing base (021b8e4) to head (05e441b).
Report is 67 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #2452   +/-   ##
=======================================
  Coverage   79.77%   79.77%           
=======================================
  Files          27       27           
  Lines        4089     4089           
=======================================
  Hits         3262     3262           
  Misses        827      827           

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