1 files changed, 36 insertions, 0 deletions
diff --git a/nixpkgs/pkgs/development/interpreters/eff/default.nix b/nixpkgs/pkgs/development/interpreters/eff/default.nix
new file mode 100644
index 000000000000..258aebe81727
--- /dev/null
+++ b/nixpkgs/pkgs/development/interpreters/eff/default.nix
@@ -0,0 +1,36 @@
+{ stdenv, fetchFromGitHub, which, ocamlPackages }:
+
+let version = "5.0"; in
+
+stdenv.mkDerivation {
+
+  name = "eff-${version}";
+
+  src = fetchFromGitHub {
+    owner = "matijapretnar";
+    repo = "eff";
+    rev = "v${version}";
+    sha256 = "1fslfj5d7fhj3f7kh558b8mk5wllwyq4rnhfkyd96fpy144sdcka";
+  };
+
+  buildInputs = [ which ] ++ (with ocamlPackages; [
+    ocaml findlib ocamlbuild menhir js_of_ocaml js_of_ocaml-ocamlbuild
+  ]);
+
+  doCheck = true;
+  checkTarget = "test";
+
+  meta = with stdenv.lib; {
+    homepage = http://www.eff-lang.org;
+    description = "A functional programming language based on algebraic effects and their handlers";
+    longDescription = ''
+      Eff is a functional language with handlers of not only exceptions,
+      but also of other computational effects such as state or I/O. With
+      handlers, you can simply implement transactions, redirections,
+      backtracking, multi-threading, and much more...
+    '';
+    license = licenses.bsd2;
+    inherit (ocamlPackages.ocaml.meta) platforms;
+    maintainers = [ maintainers.jirkamarsik ];
+  };
+}