syb-0.1.0.1 doesn't require base >= 4 in its .cabal file
the syb package imports Data.Data, so it needs base-4.*.
syb-0.1.0.0 "correctly" depends on base >= 4 (it's more future proof to use an upper bound too), but syb-0.1.0.1 just uses base with no version range specified. This leads cabal-install to think it's safe to use base-3 making the build fail.
Trac metadata
| Trac field | Value |
|---|---|
| Version | |
| Type | Bug |
| TypeOfFailure | OtherFailure |
| Priority | normal |
| Resolution | Unresolved |
| Component | libraries (other) |
| Test case | |
| Differential revisions | |
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| Operating system | |
| Architecture |