Elm: 0.19.0 -> 0.19.1

pkgs/development/compilers/elm/default.nix

@@ -4,7 +4,7 @@
 let
   fetchElmDeps = import ./fetchElmDeps.nix { inherit stdenv lib fetchurl; };
 
-  hsPkgs = haskell.packages.ghc865.override {
+  hsPkgs = haskell.packages.ghc881.override {
     overrides = self: super: with haskell.lib;
       let elmPkgs = rec {
             elm = overrideCabal (self.callPackage ./packages/elm.nix { }) (drv: {
@@ -12,14 +12,9 @@ let
               enableParallelBuilding = false;
               preConfigure = self.fetchElmDeps {
                 elmPackages = (import ./packages/elm-srcs.nix);
-                versionsDat = ./versions.dat;
+                elmVersion = drv.version;
+                registryDat = ./registry.dat;
               };
-              patches = [
-                (fetchpatch {
-                  url = "https://github.com/elm/compiler/pull/1886/commits/39d86a735e28da514be185d4c3256142c37c2a8a.patch";
-                  sha256 = "0nni5qx1523rjz1ja42z6z9pijxvi3fgbw1dhq5qi11mh1nb9ay7";
-                })
-              ];
               buildTools = drv.buildTools or [] ++ [ makeWrapper ];
               jailbreak = true;
               postInstall = ''
@@ -32,8 +27,14 @@ let
             The elm-format expression is updated via a script in the https://github.com/avh4/elm-format repo:
             `package/nix/build.sh`
             */
-            elm-format = justStaticExecutables (doJailbreak (self.callPackage ./packages/elm-format.nix {}));
-            elmi-to-json = justStaticExecutables (self.callPackage ./packages/elmi-to-json.nix {});
+            #elm-format = justStaticExecutables (doJailbreak (self.callPackage ./packages/elm-format.nix {}));
+            elmi-to-json = justStaticExecutables (overrideCabal (self.callPackage ./packages/elmi-to-json.nix {}) (drv: {
+              prePatch = '' 
+                substituteInPlace package.yaml --replace "- -Werror" ""
+                hpack
+              '';
+              jailbreak = true;
+            }));
 
             inherit fetchElmDeps;
             elmVersion = elmPkgs.elm.version;