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-rw-r--r--gnu/packages/haskell.scm24
1 files changed, 24 insertions, 0 deletions
diff --git a/gnu/packages/haskell.scm b/gnu/packages/haskell.scm
index 552c57ddc5..70853851c8 100644
--- a/gnu/packages/haskell.scm
+++ b/gnu/packages/haskell.scm
@@ -3970,6 +3970,30 @@ a subset of @code{MonadBase} into which generic control operations such as
@code{catch} can be lifted from @code{IO} or any other base monad.")
(license license:bsd-3)))
+(define-public ghc-fail
+ (package
+ (name "ghc-fail")
+ (version "4.9.0.0")
+ (source
+ (origin
+ (method url-fetch)
+ (uri (string-append "https://hackage.haskell.org/package/fail/fail-"
+ version ".tar.gz"))
+ (sha256
+ (base32 "18nlj6xvnggy61gwbyrpmvbdkq928wv0wx2zcsljb52kbhddnp3d"))))
+ (build-system haskell-build-system)
+ (home-page "https://prime.haskell.org/wiki/Libraries/Proposals/MonadFail")
+ (synopsis "Forward-compatible MonadFail class")
+ (description
+ "This package contains the @code{Control.Monad.Fail} module providing the
+@uref{https://prime.haskell.org/wiki/Libraries/Proposals/MonadFail, MonadFail}
+class that became available in
+@uref{https://hackage.haskell.org/package/base-4.9.0.0, base-4.9.0.0} for
+older @code{base} package versions. This package turns into an empty package
+when used with GHC versions which already provide the
+@code{Control.Monad.Fail} module.")
+ (license license:bsd-3)))
+
(define-public ghc-byteorder
(package
(name "ghc-byteorder")