exit with error on failed library install

[emmachughes]

For automation, it is crucial to know if the command succeeded or not.

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 69.26%. Comparing base (aaa05af) to head (bc02bb3). Report is 8 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff            @@
##             master    #2752   +/-   ##
=========================================
  Coverage     69.26%   69.26%           
  Complexity     2721     2721           
=========================================
  Files           274      274           
  Lines         11604    11604           
=========================================
  Hits           8038     8038           
  Misses         3566     3566           

Components	Coverage Δ
contentauthor	69.26% <ø> (ø)