gnu: r-rcpp: Update to 0.12.15. * gnu/packages/cran.scm (r-rcpp): Update to 0.12.15.
gnu: Add r-xfun. * gnu/packages/cran.scm (r-xfun): New variable.
gnu: unzip: Mitigate CVE-2018-1000035. * gnu/packages/compression.scm (unzip)[replacement]: New field. (unzip/fixed): New variable.
gnu: Add ghc-megaparsec. * gnu/packages/haskell.scm (ghc-megaparsec): New variable.
gnu: Add ghc-parser-combinators. * gnu/packages/haskell.scm (ghc-parser-combinators): New variable.
gnu: Add ghc-text-binary. * gnu/packages/haskell.scm (ghc-text-binary): New variable.
gnu: ghc-trifecta: Update to 1.7.1.1. * gnu/packages/haskell.scm (ghc-trifecta): Update to 1.7.1.1. [inputs]: Add ghc-doctest. [native-inputs]: Add cabal-doctest.
gnu: ghc-reducers: Update to 3.12.2. * gnu/packages/haskell.scm (ghc-reducers): Update to 3.12.2.
gnu: ghc-directory: Add note. * gnu/packages/haskell.scm (ghc-directory): Add comment not to use this package as an input.
gnu: darcs: Update to 2.12.5. * gnu/packages/version-control.scm (darcs): Update to 2.12.5. [arguments]: Relax version constraint on shelly.
gnu: darcs: Remove ghc-directory from inputs. * gnu/packages/version-control.scm (darcs)[inputs]: Remove ghc-directory.
gnu: ghc-graphviz: Fix build with newer QuickCheck. * gnu/packages/haskell.scm (ghc-graphviz)[arguments]: Allow building with newer QuickCheck.
gnu: ghc-tar: Disable tests. * gnu/packages/haskell.scm (ghc-tar)[arguments]: Disable tests.
gnu: ghc-system-filepath: Update to 0.4.14. * gnu/packages/haskell.scm (ghc-system-filepath): Update to 0.4.14. [arguments]: Disable tests.
gnu: darcs: Remove ghc-process from inputs. * gnu/packages/version-control.scm (darcs)[inputs]: Remove ghc-process.
gnu: ghc-hslogger: Remove ghc-process from inputs. * gnu/packages/haskell.scm (ghc-hslogger)[inputs]: Remove ghc-process.
gnu: ghc-process: Update to 1.6.3.0. * gnu/packages/haskell.scm (ghc-process): Update to 1.6.3.0.
gnu: ghc-haskeline: Update to 0.7.4.2. * gnu/packages/haskell.scm (ghc-haskeline): Update to 0.7.4.2. [inputs]: Add ghc-stm.
gnu: ghc-fgl-arbitrary: Fix build with newer QuickCheck. * gnu/packages/haskell.scm (ghc-fgl-arbitrary)[arguments]: Allow building with newer QuickCheck.
gnu: ghc-fgl: Fix build with newer QuickCheck. * gnu/packages/haskell.scm (ghc-fgl)[arguments]: Allow building with newer QuickCheck.