Passing an expression `expr` that evaluates to a store path to any built-in function which reads from the filesystem constitutes IFD.
Chunks
bdd5edea (1st chunk of `pkgs/by-name/te/textlint-rule-unexpanded-acronym/test.md`)
Title: Implicit Fetch from Derivation (IFD) Definition
Summary
Implicit Fetch from Derivation (IFD) occurs when a built-in function reads from the filesystem using a store path that is the result of evaluating an expression.