Things like module dependencies, apparently: <a href="https:&#x2F;&#x2F;groups.google.com&#x2F;forum&#x2F;#!searchin&#x2F;ninja-build&#x2F;fortran&#x2F;ninja-build&#x2F;tPOcu5EWXio&#x2F;gVLKEnGKlz8J" rel="nofollow">https:&#x2F;&#x2F;groups.google.com&#x2F;forum&#x2F;#!searchin&#x2F;ninja-build&#x2F;fortr...</a>