The changes I made in version-control.scm and gnucash.scm in commit e6301fb76d0a8d931ece2e18d197e3c2cc53fc6c revealed an abstraction leakage I wasn’t aware of: there’s a pattern where users “see” that thunked fields are thunked: (package ;; … (inputs …) (arguments `(foo bar ,(inputs) …))) ;<- here ‘inputs’ is seen as a thunk Fortunately I could only find two occurrences of this and this use case is more elegantly replaced by: (package-inputs this-record) … which also has better semantics. It’s remains a bug, though. Ludo’.