diff --git a/pkgs/misc/emulators/atari800/builder.sh b/pkgs/misc/emulators/atari800/builder.sh
deleted file mode 100644
index afb9404657a..00000000000
--- a/pkgs/misc/emulators/atari800/builder.sh
+++ /dev/null
@@ -1,13 +0,0 @@
-source $stdenv/setup
-
-preConfigure() {
-    cd src
-}
-
-postInstall() {
-    romsDir=$out/share/atari800/roms
-    mkdir -p $romsDir
-    unzip $rom -d $romsDir
-}
-
-genericBuild
diff --git a/pkgs/misc/emulators/atari800/default.nix b/pkgs/misc/emulators/atari800/default.nix
index fb79b3379bd..af8d64982a0 100644
--- a/pkgs/misc/emulators/atari800/default.nix
+++ b/pkgs/misc/emulators/atari800/default.nix
@@ -5,22 +5,18 @@ with stdenv.lib;
 stdenv.mkDerivation rec{
   name = "atari800-${version}";
   version = "3.1.0";
-  builder = ./builder.sh;
 
   src = fetchurl {
     url = "mirror://sourceforge/atari800/atari800/${version}/${name}.tar.gz";
     sha256 = "030yz5l1wyq9l0dmiimiiwpzrjr43whycd409xhhpnrdx76046wh";
   };
 
-  rom = fetchurl {
-    url = http://downloads.sourceforge.net/project/atari800/ROM/Original%20XL%20ROM/xf25.zip;
-    sha256 = "12jbawxs04i0wm3910n7f3phsybdp8nndxc0xlsnzp8k0k8hmblq";
-  };
-
   buildInputs = [ unzip zlib SDL readline mesa libX11 ];
 
   configureFlags = "--target=default --with-video=sdl --with-sound=sdl --with-readline --with-opengl --with-x --enable-riodevice";
 
+  preConfigure = "cd src";
+
   meta = {
     homepage = "http://atari800.sourceforge.net/";
     description = "An Atari 8-bit emulator";