1 files changed, 47 insertions, 0 deletions
diff --git a/nixpkgs/pkgs/development/compilers/elm/default.nix b/nixpkgs/pkgs/development/compilers/elm/default.nix
new file mode 100644
index 000000000000..f14bce5d96b3
--- /dev/null
+++ b/nixpkgs/pkgs/development/compilers/elm/default.nix
@@ -0,0 +1,47 @@
+{ lib, stdenv, buildEnv
+, haskell, nodejs
+, fetchurl, fetchpatch, makeWrapper, git }:
+
+let
+  fetchElmDeps = import ./fetchElmDeps.nix { inherit stdenv lib fetchurl; };
+  hsPkgs = haskell.packages.ghc864.override {
+    overrides = self: super: with haskell.lib;
+      let elmPkgs = {
+            elm = overrideCabal (self.callPackage ./packages/elm.nix { }) (drv: {
+              # sadly with parallelism most of the time breaks compilation
+              enableParallelBuilding = false;
+              preConfigure = self.fetchElmDeps {
+                elmPackages = (import ./packages/elm-srcs.nix);
+                versionsDat = ./versions.dat;
+              };
+              patches = [
+                (fetchpatch {
+                  url = "https://github.com/elm/compiler/pull/1886/commits/39d86a735e28da514be185d4c3256142c37c2a8a.patch";
+                  sha256 = "0nni5qx1523rjz1ja42z6z9pijxvi3fgbw1dhq5qi11mh1nb9ay7";
+                })
+              ];
+              buildTools = drv.buildTools or [] ++ [ makeWrapper ];
+              jailbreak = true;
+              postInstall = ''
+                wrapProgram $out/bin/elm \
+                  --prefix PATH ':' ${lib.makeBinPath [ nodejs ]}
+              '';
+            });
+
+            /*
+            The elm-format expression is updated via a script in the https://github.com/avh4/elm-format repo:
+            `pacakge/nix/build.sh`
+            */
+            elm-format = justStaticExecutables (doJailbreak (self.callPackage ./packages/elm-format.nix {}));
+
+            inherit fetchElmDeps;
+            elmVersion = elmPkgs.elm.version;
+          };
+      in elmPkgs // {
+        inherit elmPkgs;
+
+        # Needed for elm-format
+        indents = self.callPackage ./packages/indents.nix {};
+      };
+  };
+in hsPkgs.elmPkgs