Merge pull request #2457 from jwiegley/posix-paths

Add expression for the Haskell posix-paths library

pkgs/development/libraries/haskell/posix-paths/default.nix

···
+{ cabal, doctest, HUnit, QuickCheck }:
+
+cabal.mkDerivation (self: {
+  pname = "posix-paths";
+  version = "0.2.0.3";
+  sha256 = "16r0sd2m9xzzkrvj6qvc7z3yc8r83kpx724v5wifphcri3scvznv";
+  testDepends = [ doctest HUnit QuickCheck ];
+  meta = {
+    description = "POSIX filepath/directory functionality";
+    license = self.stdenv.lib.licenses.bsd3;
+    platforms = self.ghc.meta.platforms;
+  };
+})

pkgs/top-level/haskell-packages.nix

···
     libc = pkgs.stdenv.gcc.libc;
   };
 
+  posixPaths = callPackage ../development/libraries/haskell/posix-paths {};
+
   postgresqlLibpq = callPackage ../development/libraries/haskell/postgresql-libpq {
     inherit (pkgs) postgresql;
   };