+(define-public ghc-persistent-test
+ (package
+ (name "ghc-persistent-test")
+ (version "2.0.3.1")
+ (source
+ (origin
+ (method url-fetch)
+ (uri (string-append
+ "https://hackage.haskell.org/package/persistent-test/"
+ "persistent-test-" version ".tar.gz"))
+ (sha256
+ (base32
+ "11aq5cy0n43jamf6mg4sr4300bc2zdbjxsczzxwjkb4hzs0ijsdv"))))
+ (build-system haskell-build-system)
+ (inputs
+ `(("ghc-aeson" ,ghc-aeson)
+ ("ghc-blaze-html" ,ghc-blaze-html)
+ ("ghc-conduit" ,ghc-conduit)
+ ("ghc-monad-control" ,ghc-monad-control)
+ ("ghc-monad-logger" ,ghc-monad-logger)
+ ("ghc-path-pieces" ,ghc-path-pieces)
+ ("ghc-persistent" ,ghc-persistent)
+ ("ghc-persistent-template" ,ghc-persistent-template)
+ ("ghc-random" ,ghc-random)
+ ("ghc-resourcet" ,ghc-resourcet)
+ ("ghc-transformers-base" ,ghc-transformers-base)
+ ("ghc-unliftio" ,ghc-unliftio)
+ ("ghc-unliftio-core" ,ghc-unliftio-core)
+ ("ghc-unordered-containers" ,ghc-unordered-containers)))
+ (native-inputs
+ `(("ghc-quickcheck" ,ghc-quickcheck)
+ ("ghc-quickcheck-instances" ,ghc-quickcheck-instances)
+ ("ghc-hspec" ,ghc-hspec)
+ ("ghc-hspec-expectations" ,ghc-hspec-expectations)
+ ("ghc-hunit" ,ghc-hunit)))
+ (home-page "https://www.yesodweb.com/book/persistent")
+ (synopsis "Tests for the Persistent database library")
+ (description
+ "This is only for use in developing libraries that should conform to
+the persistent interface, not for users of the persistent suite of database
+libraries.")
+ (license license:expat)))
+
+(define-public ghc-pipes
+ (package
+ (name "ghc-pipes")
+ (version "4.3.13")
+ (source
+ (origin
+ (method url-fetch)
+ (uri (string-append
+ "https://hackage.haskell.org/package/pipes/"
+ "pipes-" version ".tar.gz"))
+ (sha256
+ (base32
+ "1ch3xr5f5if0psd3lsyrpkwrgh36synnzqcpimghprys68l4zfkn"))))
+ (build-system haskell-build-system)
+ (inputs
+ `(("ghc-exceptions" ,ghc-exceptions)
+ ("ghc-mmorph" ,ghc-mmorph)
+ ("ghc-void" ,ghc-void)
+ ("ghc-semigroups" ,ghc-semigroups)))
+ (native-inputs
+ `(("ghc-quickcheck" ,ghc-quickcheck)
+ ("ghc-test-framework" ,ghc-test-framework)
+ ("ghc-test-framework-quickcheck2"
+ ,ghc-test-framework-quickcheck2)))
+ (home-page
+ "https://hackage.haskell.org/package/pipes")
+ (synopsis "Compositional pipelines")
+ (description
+ "A clean and powerful stream processing library that lets you build
+and connect reusable streaming components. Advantages over traditional streaming
+libraries:
+@itemize
+@item Concise API: Use simple commands like @code{for}, (@code{>->}), @code{await},
+and @code{yield}
+@item Blazing fast: Implementation tuned for speed, including shortcut fusion
+@item Lightweight Dependency: pipes is small and compiles very rapidly, including
+dependencies
+@item Elegant semantics: Use practical category theory
+@item ListT: Correct implementation of @code{ListT} that interconverts with pipes
+@item Bidirectionality: Implement duplex channels
+@end itemize")
+ (license license:bsd-3)))
+
+(define-public ghc-pointedlist
+ (package
+ (name "ghc-pointedlist")
+ (version "0.6.1")
+ (source
+ (origin
+ (method url-fetch)
+ (uri (string-append
+ "https://hackage.haskell.org/package/pointedlist/"
+ "pointedlist-" version ".tar.gz"))
+ (sha256
+ (base32
+ "16xsrzqql7i4z6a3xy07sqnbyqdmcar1jiacla58y4mvkkwb0g3l"))))
+ (build-system haskell-build-system)
+ (home-page
+ "https://hackage.haskell.org/package/pointedlist")
+ (synopsis
+ "Zipper-like comonad which works as a list, tracking a position")
+ (description
+ "A PointedList tracks the position in a non-empty list which works
+similarly to a zipper. A current item is always required, and therefore
+the list may never be empty. A circular PointedList wraps around to the
+other end when progressing past the actual edge.")
+ (license license:bsd-3)))
+