gnu: Add ghc-constraints-extras.
* gnu/packages/haskell-xyz.scm (ghc-constraints-extras): New variable. Signed-off-by: Ludovic Courtès <ludo@gnu.org>
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@ -2468,6 +2468,29 @@ They stopped crashing the compiler in GHC 7.6. This package provides
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a vocabulary for working with them.")
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a vocabulary for working with them.")
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(license license:bsd-2)))
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(license license:bsd-2)))
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(define-public ghc-constraints-extras
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(package
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(name "ghc-constraints-extras")
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(version "0.4.0.0")
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(source (origin
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(method url-fetch)
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(uri (hackage-uri "constraints-extras" version))
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(sha256
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(base32
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"1irf4kd7a5h1glczbc73c3590m58azn4s68nfrjfg1h96i7mjfgn"))))
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(build-system haskell-build-system)
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(properties '((upstream-name . "constraints-extras")))
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(inputs (list ghc-constraints ghc-aeson))
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(arguments
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`(#:cabal-revision ("1"
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"1fdabah3ilq9yf94916ml3c3rxgcgab1jhzl4mk1zgzsw78j53qf")))
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(home-page "https://github.com/obsidiansystems/constraints-extras")
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(synopsis "Utility package for constraints")
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(description
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"Convenience functions and TH for working with constraints. See
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@file{README.md} for example usage.")
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(license license:bsd-3)))
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(define-public ghc-contravariant
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(define-public ghc-contravariant
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(package
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(package
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(name "ghc-contravariant")
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(name "ghc-contravariant")
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