Fix haskellPackackages_ghc742_pedantic package set, which was broken by an earlier commit.

pkgs/development/libraries/haskell/HTTP/4000.2.5.nix

@@ -0,0 +1,15 @@
+{ cabal, mtl, network, parsec }:
+
+cabal.mkDerivation (self: {
+  pname = "HTTP";
+  version = "4000.2.5";
+  sha256 = "03ij1zkykc438x2r1szz6ddvfhrjywlx61nrz377srcpbdmhxpb7";
+  buildDepends = [ mtl network parsec ];
+  meta = {
+    homepage = "https://github.com/haskell/HTTP";
+    description = "A library for client-side HTTP";
+    license = self.stdenv.lib.licenses.bsd3;
+    platforms = self.ghc.meta.platforms;
+    maintainers = [ self.stdenv.lib.maintainers.andres ];
+  };
+})