Compile failure with GHC 7.4.2 / inaccurate version bounds

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Assessment

Difficulty
2/5
Estimated time
1-3 hours
Newbie friendliness
30/100
Issue type
Bug
Clarity
Mostly clear
Activity status
Stale
Tech stack
haskell
Domain
build-system

Research direction

Start with src/Data/Thyme/Calendar/WeekdayOfMonth.hs and the package's .cabal file, then reproduce the failure with GHC 7.4.2. Check how the GHC.Generics dependency and base version bounds are declared; done means the bounds accurately describe supported versions and the package compiles with GHC 7.4.2.

Written by the indexing model from the issue text.

Description

recent thyme releases fail to compile with GHC 7.4 even though declaring support for base >= 4.5 (but base-4.5 doesn't have GHC.Generics):

Configuring component lib from thyme-0.3.5.5
Preprocessing library thyme-0.3.5.5...

src/Data/Thyme/Calendar/WeekdayOfMonth.hs:33:8:
    Could not find module `GHC.Generics'
    It is a member of the hidden package `ghc-prim'.
    Perhaps you need to add `ghc-prim' to the build-depends in your .cabal file.
    Use -v to see a list of the files searched for.
Dominant language
Haskell
Stars
47
Forks
35
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