diff --git a/README.md b/README.md
index 13beef4..aa63b18 100644
--- a/README.md
+++ b/README.md
@@ -11,12 +11,25 @@ inputs = {
 }
 ```
 
-Then in the `configuration.nix` in the `environment.systemPackages` add
+## Packages
+
+This flake exposes two packages, corresponding to the `specific` and `generic` zen versions.
+The generic version maximizes compatibility with old CPUs and kernels by compiling it with some
+lower common denominator CFLAGS, the `specific` one targets newer CPUs and kernels but it may not
+work in your case.
+
+The `default` package is the `specific` one for backwards compatibility with older versions of the flake.
+
+Then in the `configuration.nix` in the `environment.systemPackages` add one of:
 
 ```nix
 inputs.zen-browser.packages."${system}".default
+inputs.zen-browser.packages."${system}".specific
+inputs.zen-browser.packages."${system}".generic
 ```
 
+Depending on which version you want
+
 ```shell
 $ sudo nixos-rebuild switch
 $ zen
diff --git a/flake.nix b/flake.nix
index 551812d..62010f0 100644
--- a/flake.nix
+++ b/flake.nix
@@ -9,7 +9,17 @@
     let
       system = "x86_64-linux";
       version = "1.0.0-a.27";
-      downloadUrl = "https://github.com/zen-browser/desktop/releases/download/${version}/zen.linux-specific.tar.bz2";
+      downloadUrl = {
+        "specific" = {
+	  url = "https://github.com/zen-browser/desktop/releases/download/${version}/zen.linux-specific.tar.bz2";
+	  sha256 = "sha256:1z81dg3xgfpkyj501gflx8lw7d8124iqwm27zqfja2b47zf4ai2x";
+	};
+	"generic" = {
+	  url = "https://github.com/zen-browser/desktop/releases/download/${version}/zen.linux-generic.tar.bz2";
+	  sha256 = "sha256:1801pcvvmmdz5drqvxs95yzij099mhq7cnw663dna4kcn2nqwvni";
+	};
+      };
+
       pkgs = import nixpkgs {
         inherit system;
       };
@@ -20,41 +30,51 @@
       ] ++ (with pkgs.xorg; [
         libxcb libX11 libXcursor libXrandr libXi libXext libXcomposite libXdamage libXfixes
       ]);
+
+      mkZen = { variant }: 
+        let
+	  downloadData = downloadUrl."${variant}";
+	in
+             pkgs.stdenv.mkDerivation {
+		name = "zen-browser";
+
+		src = builtins.fetchTarball {
+		  url = downloadData.url;
+		  sha256 = downloadData.sha256;
+		};
+		
+		desktopSrc = ./.;
+
+		phases = [ "installPhase" "fixupPhase" ];
+
+		nativeBuildInputs = [ pkgs.makeWrapper pkgs.copyDesktopItems pkgs.wrapGAppsHook ] ;
+
+		installPhase = ''
+		  mkdir -p $out/bin && cp -r $src/* $out/bin
+		  install -D $desktopSrc/zen.desktop $out/share/applications/dev.zen.Zen.desktop
+		  install -D $src/browser/chrome/icons/default/default128.png $out/share/icons/hicolor/128x128/apps/zen.png
+		'';
+
+		fixupPhase = ''
+		  chmod 755 $out/bin/*
+		  patchelf --set-interpreter "$(cat $NIX_CC/nix-support/dynamic-linker)" $out/bin/zen
+		  wrapProgram $out/bin/zen --set LD_LIBRARY_PATH "${pkgs.lib.makeLibraryPath runtimeLibs}"
+		  patchelf --set-interpreter "$(cat $NIX_CC/nix-support/dynamic-linker)" $out/bin/zen-bin
+		  wrapProgram $out/bin/zen-bin --set LD_LIBRARY_PATH "${pkgs.lib.makeLibraryPath runtimeLibs}"
+		  patchelf --set-interpreter "$(cat $NIX_CC/nix-support/dynamic-linker)" $out/bin/glxtest
+		  wrapProgram $out/bin/glxtest --set LD_LIBRARY_PATH "${pkgs.lib.makeLibraryPath runtimeLibs}"
+		  patchelf --set-interpreter "$(cat $NIX_CC/nix-support/dynamic-linker)" $out/bin/updater
+		  wrapProgram $out/bin/updater --set LD_LIBRARY_PATH "${pkgs.lib.makeLibraryPath runtimeLibs}"
+		  patchelf --set-interpreter "$(cat $NIX_CC/nix-support/dynamic-linker)" $out/bin/vaapitest
+		  wrapProgram $out/bin/vaapitest --set LD_LIBRARY_PATH "${pkgs.lib.makeLibraryPath runtimeLibs}"
+		'';
+	      };
     in
     {
-      packages.${system}.default = pkgs.stdenv.mkDerivation {
-        name = "zen-browser";
-
-	src = builtins.fetchTarball {
-		  url = downloadUrl;
-		  sha256 = "sha256:1z81dg3xgfpkyj501gflx8lw7d8124iqwm27zqfja2b47zf4ai2x";
-		};
-	
-	desktopSrc = ./.;
-
-	phases = [ "installPhase" "fixupPhase" ];
-
-	nativeBuildInputs = [ pkgs.makeWrapper pkgs.copyDesktopItems pkgs.wrapGAppsHook ] ;
-
-	installPhase = ''
-	  mkdir -p $out/bin && cp -r $src/* $out/bin
-	  install -D $desktopSrc/zen.desktop $out/share/applications/dev.zen.Zen.desktop
-	  install -D $src/browser/chrome/icons/default/default128.png $out/share/icons/hicolor/128x128/apps/zen.png
-	'';
-
-	fixupPhase = ''
-	  chmod 755 $out/bin/*
-          patchelf --set-interpreter "$(cat $NIX_CC/nix-support/dynamic-linker)" $out/bin/zen
-          wrapProgram $out/bin/zen --set LD_LIBRARY_PATH "${pkgs.lib.makeLibraryPath runtimeLibs}"
-          patchelf --set-interpreter "$(cat $NIX_CC/nix-support/dynamic-linker)" $out/bin/zen-bin
-          wrapProgram $out/bin/zen-bin --set LD_LIBRARY_PATH "${pkgs.lib.makeLibraryPath runtimeLibs}"
-          patchelf --set-interpreter "$(cat $NIX_CC/nix-support/dynamic-linker)" $out/bin/glxtest
-          wrapProgram $out/bin/glxtest --set LD_LIBRARY_PATH "${pkgs.lib.makeLibraryPath runtimeLibs}"
-          patchelf --set-interpreter "$(cat $NIX_CC/nix-support/dynamic-linker)" $out/bin/updater
-          wrapProgram $out/bin/updater --set LD_LIBRARY_PATH "${pkgs.lib.makeLibraryPath runtimeLibs}"
-          patchelf --set-interpreter "$(cat $NIX_CC/nix-support/dynamic-linker)" $out/bin/vaapitest
-          wrapProgram $out/bin/vaapitest --set LD_LIBRARY_PATH "${pkgs.lib.makeLibraryPath runtimeLibs}"
-        '';
+      packages."${system}" = {
+        generic = mkZen { variant = "generic"; };
+        specific = mkZen { variant = "specific"; };
+	default = self.packages."${system}".specific;
       };
     };
 }