Update Nix zig version & build from source instructions

BUILDING_FROM_SOURCE.md

@@ -40,11 +40,16 @@ sudo apt-get install libxcb-render0-dev libxcb-shape0-dev libxcb-xfixes0-dev
 ```
 
 ### Zig
-**version: 0.7.x**
+**version: 0.8.0**
 
-If you're on MacOS, you can install with `brew install zig`
-If you're on Ubuntu and use Snap, you can install with `snap install zig --classic --beta`
-For any other OS, checkout the [Zig installation page](https://github.com/ziglang/zig/wiki/Install-Zig-from-a-Package-Manager)
+For any OS, you can use [`zigup`](https://github.com/marler8997/zigup) to manage zig installations.
+
+If you prefer a package manager, you can try the following:
+- For MacOS, you can install with `brew install zig`
+- For, Ubuntu, you can use Snap, you can install with `snap install zig --classic --beta`
+- For other systems, checkout this [page](https://github.com/ziglang/zig/wiki/Install-Zig-from-a-Package-Manager)
+
+If you want to install it manually, you can also download Zig directly [here](https://ziglang.org/download/). Just make sure you download the right version, the bleeding edge master build is the first download link on this page.
 
 ### LLVM
 **version: 10.0.x**

nix/zig-unstable.nix

@@ -1,50 +0,0 @@
-{ pkgs }:
-
-let
-  # system helpers
-  splitSystem = builtins.split "-" builtins.currentSystem;
-  arch = builtins.elemAt splitSystem 0;
-  isAarch64 = arch == "aarch64";
-  setForSystem = { darwin, darwinAarch64, linux, linuxAarch64 }:
-    if pkgs.stdenv.isDarwin
-    then (
-      if isAarch64
-      then darwinAarch64
-      else darwin
-    )
-    else (
-      if isAarch64
-      then linuxAarch64
-      else linux
-    );
-
-  version = "0.8.0-dev.2711+11ae6c42c";
-  osName =
-    if pkgs.stdenv.isDarwin
-    then "macos" else "linux";
-  archiveName = "zig-${osName}-${arch}-${version}";
-  sha256 = setForSystem {
-    darwin = "bf2a4cd1516d202cfbbcaa7b1308d36aa21a9f9284b39297e70f98c003f479e3";
-    darwinAarch64 = "6bc35c3b40b853cd351c890c94c4a6043f5ca492ff6d704bdb1544fe1fe54d9a";
-    linux = "b443cc2259fe7712ffc954745266e3ec846e27854713d817bcec35fefd655a8c";
-    linuxAarch64 = "229830e6dc92f641a1106af3a8ee96fdef379ffd3a3d7db7ed62d2b46bd8ed45";
-  };
-in
-pkgs.stdenv.mkDerivation {
-  pname = "zig-unstable";
-  version = version;
-  src = pkgs.fetchurl {
-    inherit sha256;
-    name = "${archiveName}.tar.xz";
-    url = "https://ziglang.org/builds/${archiveName}.tar.xz";
-  };
-  phases = [ "unpackPhase" ];
-  unpackPhase = ''
-    mkdir -p $out/bin
-    tar -xf $src
-    cp ${archiveName}/zig $out/zig
-    cp -r ${archiveName}/lib $out/lib
-    ln -s "$out/zig" "$out/bin/zig"
-    chmod +x $out/bin/zig
-  '';
-}

nix/zig.nix

@@ -1,28 +1,48 @@
 { pkgs }:
 
-if pkgs.stdenv.isDarwin then
-  let
-    version = "0.7.1";
-    archiveName = "zig-macos-x86_64-${version}";
-    sha256 = "845cb17562978af0cf67e3993f4e33330525eaf01ead9386df9105111e3bc519";
-  in
-    pkgs.stdenv.mkDerivation {
-      pname = "zig";
-      version = version;
-      src = pkgs.fetchurl {
-        inherit sha256;
-        name = "${archiveName}.tar.xz";
-        url = "https://ziglang.org/download/${version}/${archiveName}.tar.xz";
-      };
-      phases = [ "unpackPhase" ];
-      unpackPhase = ''
-        mkdir -p $out/bin
-        tar -xf $src
-        cp ${archiveName}/zig $out/zig
-        cp -r ${archiveName}/lib $out/lib
-        ln -s "$out/zig" "$out/bin/zig"
-        chmod +x $out/bin/zig
-      '';
-    }
-else
-  pkgs.zig
+let
+  version = "0.8.0";
+
+  osName =
+    if pkgs.stdenv.isDarwin then
+      "macos"
+    else
+      "linux";
+
+  splitSystem = builtins.split "-" builtins.currentSystem;
+  arch = builtins.elemAt splitSystem 0;
+  isAarch64 = arch == "aarch64";
+
+  archiveName = "zig-${osName}-${arch}-${version}";
+
+  # If you're system is not aarch64, we assume it's x86_64
+  sha256 =
+    if pkgs.stdenv.isDarwin then
+      if isAarch64 then
+        "b32d13f66d0e1ff740b3326d66a469ee6baddbd7211fa111c066d3bd57683111"
+      else
+        "279f9360b5cb23103f0395dc4d3d0d30626e699b1b4be55e98fd985b62bc6fbe"
+    else
+      if isAarch64 then
+        "ee204ca2c2037952cf3f8b10c609373a08a291efa4af7b3c73be0f2b27720470"
+      else
+        "502625d3da3ae595c5f44a809a87714320b7a40e6dff4a895b5fa7df3391d01e";
+in
+pkgs.stdenv.mkDerivation {
+  pname = "zig";
+  version = version;
+  src = pkgs.fetchurl {
+    inherit sha256;
+    name = "${archiveName}.tar.xz";
+    url = "https://ziglang.org/download/${version}/${archiveName}.tar.xz";
+  };
+  phases = [ "unpackPhase" ];
+  unpackPhase = ''
+    mkdir -p $out/bin
+    tar -xf $src
+    cp ${archiveName}/zig $out/zig
+    cp -r ${archiveName}/lib $out/lib
+    ln -s "$out/zig" "$out/bin/zig"
+    chmod +x $out/bin/zig
+  '';
+}

shell.nix

@@ -44,7 +44,6 @@ let
 
   llvmPkgs = pkgs.llvmPackages_10;
 
-  # zig = import ./nix/zig-unstable.nix { inherit pkgs; };
   zig = import ./nix/zig.nix { inherit pkgs; };
 
   inputs = with pkgs;[