Christopher Baines skribis: > /gnu/store/qln574djfgl8h9glij9id8jips7nnrlw-flightgear-2018.3.5 > NarSize: 18446744072099351584 > > /gnu/store/qhix6afvy2a6n7hlx4qgdns461p8kdnv-repeat-masker-4.1.1 > NarSize: 18446744071612438544 > > /gnu/store/wd9z64xpck56xzf52jwlpg8vb610b0ym-repeat-masker-4.1.1 > NarSize: 18446744071612438544 The key point here is that ‘narSize’ in the database is negative: --8<---------------cut here---------------start------------->8--- sqlite> select * from validpaths where path = '/gnu/store/qhix6afvy2a6n7hlx4qgdns461p8kdnv-repeat-masker-4.1.1'; 43262123|/gnu/store/qhix6afvy2a6n7hlx4qgdns461p8kdnv-repeat-masker-4.1.1|sha256:33328e16d8d83dcf1a6e031598dbc517aff18e6c7ccd55f7894102bab55fcdb9|1611849907|/gnu/store/rr532q5fmwj1gafdgk6nhxg9khnbsw3z-repeat-masker-4.1.1.drv|-2097113072 --8<---------------cut here---------------end--------------->8--- The actual nar size in this case is just above 2³¹ so most likely we’re seeing a signed integer wrapping error. I believe this is a very recent regression (the registration data for the item above is Jan. 28th); we have older store items with a correct ‘narSize’, such as . Thoughts? Ludo’.