feat: Add specific and generic versions of the package

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

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/${version}/zen.linux-generic.tar.bz2";
+	  sha256 = "sha256:1801pcvvmmdz5drqvxs95yzij099mhq7cnw663dna4kcn2nqwvni";
+	};
+      };
+
       pkgs = import nixpkgs {
         inherit system;
       };
@@ -20,14 +30,17 @@
       ] ++ (with pkgs.xorg; [
         libxcb libX11 libXcursor libXrandr libXi libXext libXcomposite libXdamage libXfixes
       ]);
+
+      mkZen = { variant }: 
+        let
+	  downloadData = downloadUrl."${variant}";
 	in
-    {
+             pkgs.stdenv.mkDerivation {
-      packages.${system}.default = pkgs.stdenv.mkDerivation {
 		name = "zen-browser";
 
 		src = builtins.fetchTarball {
-		  url = downloadUrl;
+		  url = downloadData.url;
-		  sha256 = "sha256:1z81dg3xgfpkyj501gflx8lw7d8124iqwm27zqfja2b47zf4ai2x";
+		  sha256 = downloadData.sha256;
 		};
 		
 		desktopSrc = ./.;
@@ -56,5 +69,12 @@
 		  wrapProgram $out/bin/vaapitest --set LD_LIBRARY_PATH "${pkgs.lib.makeLibraryPath runtimeLibs}"
 		'';
 	      };
+    in
+    {
+      packages."${system}" = {
+        generic = mkZen { variant = "generic"; };
+        specific = mkZen { variant = "specific"; };
+	default = self.packages."${system}".specific;
+      };
     };
 }