diff --git a/pkgs/applications/editors/emacs/elisp-packages/manual-packages/elisp-ffi/default.nix b/pkgs/applications/editors/emacs/elisp-packages/manual-packages/elisp-ffi/default.nix
index 74b829701b0b..4e21c8e8e79e 100644
--- a/pkgs/applications/editors/emacs/elisp-packages/manual-packages/elisp-ffi/default.nix
+++ b/pkgs/applications/editors/emacs/elisp-packages/manual-packages/elisp-ffi/default.nix
@@ -1,24 +1,20 @@
-{ lib
-, melpaBuild
-, fetchFromGitHub
-, pkg-config
-, libffi
-, writeText
+{
+  lib,
+  melpaBuild,
+  fetchFromGitHub,
+  pkg-config,
+  libffi,
 }:
 
-let
-  rev = "da37c516a0e59bdce63fb2dc006a231dee62a1d9";
-in melpaBuild {
+melpaBuild {
   pname = "elisp-ffi";
-  version = "20170518.0";
-
-  commit = rev;
+  version = "1.0.0-unstable-2017-05-18";
 
   src = fetchFromGitHub {
     owner = "skeeto";
     repo = "elisp-ffi";
-    inherit rev;
-    sha256 = "sha256-StOezQEnNTjRmjY02ub5FRh59aL6gWfw+qgboz0wF94=";
+    rev = "da37c516a0e59bdce63fb2dc006a231dee62a1d9";
+    hash = "sha256-StOezQEnNTjRmjY02ub5FRh59aL6gWfw+qgboz0wF94=";
   };
 
   nativeBuildInputs = [ pkg-config ];
@@ -28,20 +24,16 @@ in melpaBuild {
   preBuild = ''
     mv ffi.el elisp-ffi.el
     make
- '';
-
-  recipe = writeText "recipe" ''
-   (elisp-ffi :repo "skeeto/elisp-ffi" :fetcher github)
   '';
 
   meta = {
     description = "Emacs Lisp Foreign Function Interface";
     longDescription = ''
-        This library provides an FFI for Emacs Lisp so that Emacs
-        programs can invoke functions in native libraries. It works by
-        driving a subprocess to do the heavy lifting, passing result
-        values on to Emacs.
-      '';
-    license = lib.licenses.publicDomain;
+      This library provides an FFI for Emacs Lisp so that Emacs
+      programs can invoke functions in native libraries. It works by
+      driving a subprocess to do the heavy lifting, passing result
+      values on to Emacs.
+    '';
+    license = lib.licenses.unlicense;
   };
 }