add elm2nix

pkgs/development/tools/elm2nix/default.nix

@@ -0,0 +1,24 @@
+{ mkDerivation, aeson, ansi-wl-pprint, async, base, binary
+, bytestring, containers, data-default, directory, filepath, here
+, mtl, optparse-applicative, process, req, stdenv, text
+, transformers, unordered-containers
+}:
+mkDerivation {
+  pname = "elm2nix";
+  version = "0.1.0";
+  sha256 = "9ec1f1f694a38b466ebd03aaa1a035bbdb9bdae390be5b9a030611bcbfd91890";
+  isLibrary = true;
+  isExecutable = true;
+  libraryHaskellDepends = [
+    aeson async base binary bytestring containers data-default
+    directory filepath here mtl process req text transformers
+    unordered-containers
+  ];
+  executableHaskellDepends = [
+    ansi-wl-pprint base directory here optparse-applicative
+  ];
+  testHaskellDepends = [ base ];
+  homepage = "https://github.com/domenkozar/elm2nix#readme";
+  description = "Turn your Elm project into buildable Nix project";
+  license = stdenv.lib.licenses.bsd3;
+}

pkgs/top-level/all-packages.nix

@@ -6715,6 +6715,8 @@ in
 
   eql = callPackage ../development/compilers/eql {};
 
+  elm2nix = haskell.lib.justStaticExecutables (haskellPackages.callPackage ../development/tools/elm2nix {});
+
   elmPackages = recurseIntoAttrs (callPackage ../development/compilers/elm { });
 
   apache-flex-sdk = callPackage ../development/compilers/apache-flex-sdk { };