name: max-free internalName: maxFree type: uint64_t

n.b. this is deliberately int64 max rather than uint64 max because

this goes through the Nix language JSON parser and thus needs to be

representable in Nix language integers.

defaultExpr: 'std::numeric_limits<int64_t>::max()' defaultText: 'infinity'

When a garbage collection is triggered by the min-free option, it stops as soon as max-free bytes are available. The default is infinity (i.e. delete all garbage).