diff --git a/pkgs/applications/audio/ir.lv2/default.nix b/pkgs/applications/audio/ir.lv2/default.nix
index d6dbc4c55a98..cc613541a256 100644
--- a/pkgs/applications/audio/ir.lv2/default.nix
+++ b/pkgs/applications/audio/ir.lv2/default.nix
@@ -1,20 +1,21 @@
-{ stdenv, fetchurl, fftw, gtk, lv2, libsamplerate, libsndfile, pkgconfig, zita-convolver }:
+{ stdenv, fetchFromGitHub, fftw, gtk2, lv2, libsamplerate, libsndfile, pkgconfig, zita-convolver }:
 
 stdenv.mkDerivation rec {
   name = "ir.lv2-${version}";
-  version = "1.2.2";
+  version = "1.2.3";
 
-  src = fetchurl {
-    url = "http://factorial.hu/system/files/${name}.tar.gz";
-    sha256 = "17a6h2mv9xv41jpbx6bdakkngin4kqzh2v67l4076ddq609k5a7v";
+  src = fetchFromGitHub {
+    owner = "tomszilagyi";
+    repo = "ir.lv2";
+    rev = "${version}";
+    sha256 = "16vy06qb0vgwg4yx15grzh5m2q3cbzm3jd0p37g2qb8rgvjhladg";
   };
 
-  buildInputs = [ fftw gtk lv2 libsamplerate libsndfile pkgconfig zita-convolver ];
+  buildInputs = [ fftw gtk2 lv2 libsamplerate libsndfile zita-convolver ];
 
-  buildPhase = ''
-    make
-    make convert4chan
-  '';
+  nativeBuildInputs = [  pkgconfig ];
+
+  postBuild = "make convert4chan";
 
   installPhase = ''
     mkdir -p "$out/bin"
@@ -23,10 +24,6 @@ stdenv.mkDerivation rec {
 
     make PREFIX="$out" install
     install -Dm755 convert4chan "$out/bin/convert4chan"
-    # fixed location
-    sed -i 's/, but seem like its gone://' README
-    sed -i  's@rhythminmind.net/1313@rhythminmind.net/STN@' README
-    install -Dm644 README "$out/share/doc/README"
   '';
 
   meta = with stdenv.lib; {