Steam: first attempt at adding the beta client.

The script installed with this expression only copies a boostrapper and another
script to the user's home folder. Those also need to be patched to get on with
the installation.

pkgs/games/steam/default.nix

@@ -0,0 +1,37 @@
+{ stdenv, fetchurl, dpkg, makeWrapper, xz }:
+
+assert stdenv.system == "i686-linux";
+
+let version = "1.0.0.16"; in
+
+stdenv.mkDerivation rec {
+  name = "steam-${version}";
+
+  src = fetchurl {
+    url = "http://media.steampowered.com/client/installer/steam.deb";
+    sha256 = "0mx92f9hjjpg3blgmgp8sz0f3jg7m9hssdscipwybks258k8926m";
+  };
+
+  buildInputs = [ dpkg makeWrapper xz ];
+
+  phases = "installPhase";
+
+  installPhase = ''
+    mkdir -p $out
+    dpkg-deb -x $src $out
+    mv $out/usr/* $out/
+    rmdir $out/usr
+    substituteInPlace "$out/bin/steam" --replace "/bin/bash" "/bin/sh"
+    substituteInPlace "$out/bin/steam" --replace "/usr/" "$out/"
+    substituteInPlace "$out/bin/steam" --replace "\`basename \$0\`" "steam"
+    sed -i '/jockey-common/d' $out/bin/steam
+    wrapProgram "$out/bin/steam" --prefix PATH ":" \
+      "${xz}/bin"
+  '';
+
+  meta = {
+    description = "A digital distribution platform";
+    homepage = http://store.steampowered.com/;
+    license = "unfree";
+  };
+}

pkgs/top-level/all-packages.nix

@@ -9032,6 +9032,8 @@ let
 
   stardust = callPackage ../games/stardust {};
 
+  steam = callPackage_i686 ../games/steam {};
+
   stuntrally = callPackage ../games/stuntrally { };
 
   superTux = callPackage ../games/super-tux { };